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Awesome Java [![Awesome](https://awesome.re/badge.svg)](https://awesome.re)\n\nA curated list of awesome Java frameworks, libraries and software.\n\n## Contents\n\n- [Projects](#projects)\n  - [Architecture](#architecture)\n  - [Artificial Intelligence](#artificial-intelligence)\n  - [Bean Mapping](#bean-mapping)\n  - [Build](#build)\n  - [Bytecode Manipulation](#bytecode-manipulation)\n  - [Caching](#caching)\n  - [CLI](#cli)\n  - [Cloud](#cloud)\n  - [Code Analysis](#code-analysis)\n  - [Code Coverage](#code-coverage)\n  - [Code Generators](#code-generators)\n  - [Compiler-compiler](#compiler-compiler)\n  - [Computer Vision](#computer-vision)\n  - [Configuration](#configuration)\n  - [Constraint Satisfaction Problem Solver](#constraint-satisfaction-problem-solver)\n  - [CSV](#csv)\n  - [Data Structures](#data-structures)\n  - [Database](#database)\n  - [Date and Time](#date-and-time)\n  - [Dependency Injection](#dependency-injection)\n  - [Development](#development)\n  - [Distributed Applications](#distributed-applications)\n  - [Distributed Transactions](#distributed-transactions)\n  - [Distribution](#distribution)\n  - [Document Processing](#document-processing)\n  - [Financial](#financial)\n  - [Formal Verification](#formal-verification)\n  - [Functional Programming](#functional-programming)\n  - [Game Development](#game-development)\n  - [Geospatial](#geospatial)\n  - [GUI](#gui)\n  - [High Performance](#high-performance)\n  - [HTTP Clients](#http-clients)\n  - [Hypermedia Types](#hypermedia-types)\n  - [IDE](#ide)\n  - [Imagery](#imagery)\n  - [Introspection](#introspection)\n  - [Job Scheduling](#job-scheduling)\n  - [JSON](#json)\n  - [JVM and JDK](#jvm-and-jdk)\n  - [Logging](#logging)\n  - [Machine Learning](#machine-learning)\n  - [Messaging](#messaging)\n  - [Microservice](#microservice)\n  - [Miscellaneous](#miscellaneous)\n  - [Mobile Development](#mobile-development)\n  - [Monitoring](#monitoring)\n  - [Native](#native)\n  - [Natural Language Processing](#natural-language-processing)\n  - [Networking](#networking)\n  - [ORM](#orm)\n  - [PaaS](#paas)\n  - [Pathfinding](#pathfinding)\n  - [PDF](#pdf)\n  - [Performance analysis](#performance-analysis)\n  - [Platform](#platform)\n  - [Processes](#processes)\n  - [Reactive libraries](#reactive-libraries)\n  - [REST Frameworks](#rest-frameworks)\n  - [Science](#science)\n  - [Search](#search)\n  - [Security](#security)\n  - [Serialization](#serialization)\n  - [Server](#server)\n  - [Template Engine](#template-engine)\n  - [Testing](#testing)\n  - [Utility](#utility)\n  - [Version Managers](#version-managers)\n  - [Web Crawling](#web-crawling)\n  - [Web Frameworks](#web-frameworks)\n  - [Workflow Orchestration Engines](#workflow-orchestration-engines)\n- [Resources](#resources)\n  - [Related Awesome Lists](#related-awesome-lists)\n  - [Communities](#communities)\n  - [Frontends](#frontends)\n  - [Influential Books](#influential-books)\n  - [Podcasts and Screencasts](#podcasts-and-screencasts)\n  - [People](#people)\n  - [Websites](#websites)\n- [Contributing](#contributing)\n\n## Projects\n\n### Architecture\n\n_Frameworks and libraries that help implementing and verifying design and architecture concepts._\n\n- [ArchUnit](https://github.com/TNG/ArchUnit) - Test library for specifying and asserting architecture rules.\n- [jMolecules](https://github.com/xmolecules/jmolecules) - Annotations and interfaces to express design and architecture concepts in code.\n\n### Artificial Intelligence\n\n_Frameworks that help you to leverage LLMs and AI._\n\n- [LangChain4j](https://github.com/langchain4j/langchain4j) - Simplifies integration of LLMs with unified APIs and a comprehensive toolbox.\n- [MCP Java SDK](https://github.com/modelcontextprotocol/java-sdk) -  Enables applications to interact with AI models and tools through a standardized interface (i.e. Model Context Protocol), supporting both synchronous and asynchronous communication patterns.\n- [simple-openai](https://github.com/sashirestela/simple-openai) - Library to use the OpenAI API (and compatible ones) in the simplest possible way.\n- [Spring AI](https://spring.io/projects/spring-ai) - Application framework for AI engineering for Spring.\n\n### Bean Mapping\n\n_Frameworks that ease bean mapping._\n\n- [dOOv](https://github.com/doov-io/doov) - Provides fluent API for typesafe domain model validation and mapping. It uses annotations, code generation and a type safe DSL to make bean validation and mapping fast and easy.\n- [JMapper](https://github.com/jmapper-framework/jmapper-core) - Uses byte code manipulation for lightning-fast mapping. Supports annotations and API or XML configuration.\n- [MapStruct](https://github.com/mapstruct/mapstruct) - Code generator that simplifies mappings between different bean types, based on a convention-over-configuration approach.\n- [ModelMapper](https://github.com/modelmapper/modelmapper) - Intelligent object mapping library that automatically maps objects to each other.\n- [Orika](https://github.com/orika-mapper/orika) - JavaBean-mapping framework that recursively copies (among other capabilities) data from one object to another.\n- [reMap](https://github.com/remondis-it/remap) - Lambda and method handle-based mapping which requires code and not annotations if objects have different names.\n- [Selma](https://github.com/xebia-france/selma) - Annotation processor-based bean mapper.\n\n### Build\n\n_Tools that handle the build cycle and dependencies of an application._\n\n- [Apache Maven](https://maven.apache.org) - Declarative build and dependency management that favors convention over configuration. It might be preferable to Apache Ant, which uses a rather procedural approach and can be difficult to maintain.\n- [Bazel](https://bazel.build) - Tool from Google that builds code quickly and reliably.\n- [Buck2](https://github.com/facebook/buck2) - Encourages the creation of small, reusable modules consisting of code and resources.\n- [Gradle](https://gradle.org) - Incremental builds programmed via Groovy instead of declaring XML. Works well with Maven's dependency management.\n\n### Bytecode Manipulation\n\n_Libraries to manipulate bytecode programmatically._\n\n- [ASM](https://asm.ow2.io) - All-purpose, low-level bytecode manipulation and analysis.\n- [Byte Buddy](https://bytebuddy.net) - Further simplifies bytecode generation with a fluent API.\n- [bytecode-viewer](https://github.com/Konloch/bytecode-viewer) - Java 8 Jar \u0026 Android APK reverse engineering suite. (GPL-3.0-only)\n- [Byteman](https://byteman.jboss.org) - Manipulate bytecode at runtime via DSL (rules); mainly for testing/troubleshooting. (LGPL-2.1-or-later)\n- [cglib](https://github.com/cglib/cglib) - Bytecode generation library.\n- [Javassist](https://github.com/jboss-javassist/javassist) - Tries to simplify bytecode editing.\n- [Maker](https://github.com/cojen/maker) - Provides low level bytecode generation.\n- [Mixin](https://github.com/SpongePowered/Mixin) - Manipulate bytecode at runtime using real Java code.\n- [Perses](https://github.com/nicolasmanic/perses) - Dynamically injects failure/latency at the bytecode level according to principles of chaos engineering.\n- [Recaf](https://www.coley.software/Recaf/) - JVM reverse engineering toolkit, essentially an IDE for Java bytecode.\n\n### Caching\n\n_Libraries that provide caching facilities._\n\n- [cache2k](https://cache2k.org) - In-memory high performance caching library.\n- [Caffeine](https://github.com/ben-manes/caffeine) - High-performance, near-optimal caching library.\n- [Ehcache](http://www.ehcache.org) - Distributed general-purpose cache.\n- [Infinispan](https://infinispan.org) - Highly concurrent key/value datastore used for caching.\n\n### CLI\n\n_Libraries for everything related to the CLI._\n\n#### Argument Parsing\n\n_Libraries to assist with parsing command line arguments._\n\n- [Airline](https://rvesse.github.io/airline/) - Annotation-based framework for parsing Git-like command-line arguments.\n- [JCommander](http://jcommander.org) - Command-line argument-parsing framework with custom types and validation via implementing interfaces.\n- [jbock](https://github.com/jbock-java/jbock) - Reflectionless command line parser.\n- [JLine](https://github.com/jline/jline3) - Includes features from modern shells like completion or history.\n- [picocli](https://picocli.info) - ANSI colors and styles in usage help with annotation-based POSIX/GNU/any syntax, subcommands, strong typing for both options and positional args.\n\n#### Text-Based User Interfaces\n\n_Libraries that provide TUI frameworks, or building blocks related functions._\n\n- [Jansi](https://github.com/fusesource/jansi) - ANSI escape codes to format console output.\n- [Jexer](https://gitlab.com/AutumnMeowMeow/jexer) - Advanced console (and Swing) text user interface (TUI) library, with mouse-draggable windows, built-in terminal window manager, and sixel image support. Looks like [Turbo Vision](https://en.wikipedia.org/wiki/Turbo_Vision).\n- [Text-IO](https://github.com/beryx/text-io) - Aids the creation of full console-based applications.\n- [Lanterna](https://github.com/mabe02/lanterna) - Easy console text-GUI library, similar to curses. (LGPL-3.0-only)\n\n### Cloud\n\n_Libraries to integrate or use cloud-specific features._\n\n- [AWS SDK for Java](https://github.com/aws/aws-sdk-java) - Provides Java APIs for interacting with Amazon Web Services.\n- [Google Cloud Client Libraries](https://github.com/googleapis/google-cloud-java) - Client libraries for accessing Google Cloud services from Java applications.\n\n### Code Analysis\n\n_Tools that provide metrics and quality measurements._\n\n- [Checkstyle](https://github.com/checkstyle/checkstyle) - Static analysis of coding conventions and standards. (LGPL-2.1-or-later)\n- [Error Prone](https://github.com/google/error-prone) - Catches common programming mistakes as compile-time errors.\n- [Error Prone Support](https://github.com/PicnicSupermarket/error-prone-support) - Error Prone extensions: extra bug checkers and a large battery of Refaster templates.\n- [Infer](https://github.com/facebook/infer) - Modern static analysis tool for verifying the correctness of code.\n- [jQAssistant](https://jqassistant.org) - Static code analysis with Neo4J-based query language. (GPL-3.0-only)\n- [NullAway](https://github.com/uber/NullAway) - Eliminates NullPointerExceptions with low build-time overhead.\n- [PMD](https://github.com/pmd/pmd) - Source code analysis for finding bad coding practices.\n- [p3c](https://github.com/alibaba/p3c) - Provides Alibaba's coding guidelines for PMD, IDEA and Eclipse.\n- [RefactorFirst](https://github.com/jimbethancourt/RefactorFirst) - Identifies and prioritizes God Classes and Highly Coupled classes.\n- [SonarJava](https://github.com/SonarSource/sonar-java) - Static analyzer for SonarQube \u0026 SonarLint. (LGPL-3.0-only)\n- [Spoon](https://github.com/INRIA/spoon) - Library for analyzing and transforming Java source code.\n- [Spotbugs](https://github.com/spotbugs/spotbugs) - Static analysis of bytecode to find potential bugs. (LGPL-2.1-only)\n\n### Code Coverage\n\n_Frameworks and tools that enable code coverage metrics collection for test suites._\n\n- [Clover](https://www.atlassian.com/software/clover) - Relies on source-code instrumentation instead of bytecode instrumentation.\n- [Cobertura](https://cobertura.github.io/cobertura/) - Relies on offline (or static) bytecode instrumentation and class loading to collect code coverage metrics. (GPL-2.0-only)\n- [JaCoCo](https://www.eclemma.org/jacoco/) - Framework that enables collection of code coverage metrics, using both offline and runtime bytecode instrumentation.\n\n### Code Generators\n\n_Tools that generate patterns for repetitive code in order to reduce verbosity and error-proneness._\n\n- [ADT4J](https://github.com/sviperll/adt4j) - JSR-269 code generator for algebraic data types.\n- [Auto](https://github.com/google/auto) - Generates factory, service, and value classes.\n- [Avaje Http Server](https://avaje.io/http/) - Generates Lightweight JAX-RS style http servers using Javalin or Helidon (Nima) SE.\n- [Bootify ![c]](https://bootify.io) - Browser-based Spring Boot app generation with JPA model and REST API.\n- [EasyEntityToDTO](https://github.com/Marcel091004/EasyEntityToDTO) - Annotation processor for automatic DTO and Mapper generation with zero boilerplate.\n- [FreeBuilder](https://github.com/inferred/FreeBuilder) - Automatically generates the Builder pattern.\n- [Geci](https://github.com/verhas/javageci) - Discovers files that need generated code, updates automatically and writes to the source with a convenient API.\n- [Immutables](https://immutables.github.io) - Annotation processors to generate simple, safe and consistent value objects.\n- [JavaPoet](https://github.com/square/javapoet) - API to generate source files.\n- [JHipster](https://github.com/jhipster/generator-jhipster) - Yeoman source code generator for Spring Boot and AngularJS.\n- [Joda-Beans](https://www.joda.org/joda-beans/) - Small framework that adds queryable properties to Java, enhancing JavaBeans.\n- [JPA Buddy ![c]](https://www.jpa-buddy.com) - Plugin for IntelliJ IDEA. Provides visual tools for generating JPA entities, Spring Data JPA repositories, Liquibase changelogs and SQL scripts. Offers automatic Liquibase/Flyway script generation by comparing model to DB, and reverse engineering JPA entities from DB tables.\n- [Lombok](https://projectlombok.org) - Code generator that aims to reduce verbosity.\n- [Record-Builder](https://github.com/Randgalt/record-builder) - Companion builder class, withers and templates for Java records.\n- [Telosys](https://www.telosys.org/) - Simple and light code generator available as an Eclipse Plugin and also as a CLI.\n\n### Compiler-compiler\n\n_Frameworks that help to create parsers, interpreters or compilers._\n\n- [ANTLR](https://www.antlr.org) - Complex full-featured framework for top-down parsing.\n- [JavaCC](https://javacc.github.io/javacc/) - Parser generator that generates top-down parsers. Allows lexical state switching and permits extended BNF specifications.\n- [JFlex](https://jflex.de) - Lexical analyzer generator.\n\n### Computer Vision\n\n_Libraries which seek to gain high level information from images and videos._\n\n- [BoofCV](https://boofcv.org) - Library for image processing, camera calibration, tracking, SFM, MVS, 3D vision, QR Code and much more.\n- [ImageJ](https://imagej.net/ImageJ) - Medical image processing application with an API.\n- [JavaCV](https://github.com/bytedeco/javacv) - Java interface to OpenCV, FFmpeg, and much more.\n\n### Configuration\n\n_Libraries that provide external configuration._\n\n- [avaje config](https://avaje.io/config/) - Loads yaml and properties files, supports dynamic configuration, plugins, file-watching and config event listeners.\n- [centraldogma](https://github.com/line/centraldogma) - Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2.\n- [config](https://github.com/lightbend/config) - Configuration library supporting Java properties, JSON or its human optimized superset HOCON.\n- [Configurate](https://github.com/SpongePowered/Configurate) - Configuration library with support for various configuration formats and transformations.\n- [Curator Framework](https://curator.apache.org/) - High-level API for Apache ZooKeeper.\n- [dotenv](https://github.com/shyiko/dotenv) - Twelve-factor configuration library which uses environment-specific files.\n- [Externalized Properties](https://github.com/joel-jeremy/externalized-properties) - Lightweight yet powerful configuration library which supports resolution of properties from external sources and an extensible post-processing/conversion mechanism.\n- [Gestalt](https://github.com/gestalt-config/gestalt) - Gestalt offers a comprehensive solution to the challenges of configuration management. It allows you to source configuration data from multiple inputs, merge them intelligently, and present them in a structured, type-safe manner.\n- [ini4j](http://ini4j.sourceforge.net) - Provides an API for handling Windows' INI files.\n- [KAConf](https://github.com/mariomac/kaconf) - Annotation-based configuration system for Java and Kotlin.\n- [microconfig](https://microconfig.io) - Configuration system designed for microservices which helps to separate configuration from code. The configuration for different services can have common and specific parts and can be dynamically distributed.\n- [owner](https://github.com/lviggiano/owner) - Reduces boilerplate of properties.\n\n### Constraint Satisfaction Problem Solver\n\n_Libraries that help with implementing optimization and satisfiability problems._\n\n- [Choco](https://choco-solver.org) - Off-the-shelf constraint satisfaction problem solver that uses constraint programming techniques.\n- [JaCoP](https://github.com/radsz/jacop) - Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models. (AGPL-3.0)\n- [OptaPlanner](https://www.optaplanner.org) - Business planning and resource scheduling optimization solver.\n- [Timefold](https://timefold.ai/docs) - Flexible solver with Spring/Quarkus support and quickstarts for the Vehicle Routing Problem, Maintenance Scheduling, Employee Shift Scheduling and much more.\n\n### CSV\n\n_Frameworks and libraries that simplify reading/writing CSV data._\n\n- [FastCSV](https://github.com/osiegmar/FastCSV) - Performance-optimized, dependency-free and RFC 4180 compliant.\n- [jackson-dataformat-csv](https://github.com/FasterXML/jackson-dataformat-csv) - Jackson extension for reading and writing CSV.\n- [opencsv](http://opencsv.sourceforge.net) - Simple CSV parser.\n- [Super CSV](https://super-csv.github.io/super-csv/) - Powerful CSV parser with support for Dozer, Joda-Time and Java 8.\n- [uniVocity-parsers](https://github.com/uniVocity/univocity-parsers) - One of the fastest and most feature-complete parsers. Also comes with parsers for TSV and fixed-width records.\n\n### Data Structures\n\n_Efficient and specific data structures._\n\n- [Apache Avro](https://avro.apache.org) - Data interchange format with dynamic typing, untagged data, and absence of manually assigned IDs.\n- [Apache Orc](https://orc.apache.org) - Fast and efficient columnar storage format for Hadoop-based workloads.\n- [Apache Parquet](https://parquet.apache.org) - Columnar storage format based on assembly algorithms from Google's paper on Dremel.\n- [Apache Thrift](https://thrift.apache.org) - Data interchange format that originated at Facebook.\n- [Big Queue](https://github.com/bulldog2011/bigqueue) - Fast and persistent queue based on memory-mapped files.\n- [HyperMinHash-java](https://github.com/LiveRamp/HyperMinHash-java) - Probabilistic data structure for computing union, intersection, and set cardinality in loglog space.\n- [Persistent Collection](https://github.com/hrldcpr/pcollections) - Persistent and immutable analogue of the Java Collections Framework.\n- [Protobuf](https://github.com/protocolbuffers/protobuf) - Google's data interchange format.\n- [RoaringBitmap](https://github.com/RoaringBitmap/RoaringBitmap) - Fast and efficient compressed bitmap.\n- [SBE](https://github.com/real-logic/simple-binary-encoding) - Simple Binary Encoding, one of the fastest message formats around.\n- [Tape](https://github.com/square/tape) - Lightning-fast, transactional, file-based FIFO.\n- [Wire](https://github.com/square/wire) - Clean, lightweight protocol buffers.\n\n### Database\n\n_Everything that simplifies interactions with the database._\n\n- [Apache Calcite](https://calcite.apache.org) - Dynamic data management framework. It contains many of the pieces that comprise a typical database management system.\n- [Apache Drill](https://drill.apache.org) - Distributed, schema on-the-fly, ANSI SQL query engine for Big Data exploration.\n- [Apache Phoenix](https://phoenix.apache.org) - High-performance relational database layer over HBase for low-latency applications.\n- [ArangoDB](https://github.com/arangodb/arangodb-java-driver) - ArangoDB Java driver.\n- [Chronicle Map](https://github.com/OpenHFT/Chronicle-Map) - Efficient, in-memory (opt. persisted to disk), off-heap key-value store.\n- [Debezium](https://debezium.io/) - Low latency data streaming platform for change data capture.\n- [druid](https://druid.apache.org) - High-performance, column-oriented, distributed data store.\n- [eXist](https://github.com/eXist-db/exist) - NoSQL document database and application platform. (LGPL-2.1-only)\n- [FlexyPool](https://github.com/vladmihalcea/flexy-pool) - Brings metrics and failover strategies to the most common connection pooling solutions.\n- [Flyway](https://flywaydb.org) - Simple database migration tool.\n- [H2](https://h2database.com) - Small SQL database notable for its in-memory functionality.\n- [HikariCP](https://github.com/brettwooldridge/HikariCP) - High-performance JDBC connection pool.\n- [HSQLDB](https://hsqldb.org/) - HyperSQL 100% Java database.\n- [JDBI](http://jdbi.org) - Convenient abstraction of JDBC.\n- [Jedis](https://github.com/xetorthio/jedis) - Small client for interaction with Redis, with methods for commands.\n- [Jest](https://github.com/searchbox-io/Jest) - Client for the Elasticsearch REST API.\n- [jetcd](https://github.com/justinsb/jetcd) - Client library for etcd.\n- [Jinq](https://github.com/my2iu/Jinq) - Typesafe database queries via symbolic execution of Java 8 Lambdas (on top of JPA or jOOQ).\n- [jOOQ](https://www.jooq.org) - Generates typesafe code based on SQL schema.\n- [Leaf](https://github.com/Meituan-Dianping/Leaf) - Distributed ID generate service.\n- [Lettuce](https://lettuce.io/) - Lettuce is a scalable Redis client for building non-blocking Reactive applications.\n- [Liquibase](http://www.liquibase.org) - Database-independent library for tracking, managing and applying database schema changes.\n- [MapDB](http://www.mapdb.org) - Embedded database engine that provides concurrent collections backed on disk or in off-heap memory.\n- [MariaDB4j](https://github.com/vorburger/MariaDB4j) - Launcher for MariaDB that requires no installation or external dependencies.\n- [Modality](https://github.com/arkanovicz/modality) - Lightweight ORM with database reverse engineering features.\n- [OpenDJ](https://github.com/OpenIdentityPlatform/OpenDJ) - LDAPv3 compliant directory service, developed for the Java platform, providing a high performance, highly available, and secure store for the identities.\n- [Querydsl](http://www.querydsl.com) - Typesafe unified queries.\n- [QueryStream](https://github.com/querystream/querystream) - Build JPA Criteria queries using a Stream-like API.\n- [QuestDB](https://github.com/questdb/questdb) - High-performance SQL database for time series. Supports InfluxDB line protocol, PostgreSQL wire protocol, and REST.\n- [Realm](https://github.com/realm/realm-java) - Mobile database to run directly inside phones, tablets or wearables.\n- [Redisson](https://github.com/redisson/redisson) - Allows for distributed and scalable data structures on top of a Redis server.\n- [requery](https://github.com/requery/requery) - Modern, lightweight but powerful object mapping and SQL generator. Easily map to or create databases, or perform queries and updates from any Java-using platform.\n- [Speedment](https://github.com/speedment/speedment) - Database access library that utilizes Java 8's Stream API for querying.\n- [Spring Data JPA MongoDB Expressions](https://github.com/mhewedy/spring-data-jpa-mongodb-expressions) - Allows you to use MongoDB query language to query your relational database.\n- [Trino](https://trino.io) - Distributed SQL query engine for big data.\n- [Vibur DBCP](https://www.vibur.org) - JDBC connection pool library with advanced performance monitoring capabilities.\n- [Xodus](https://github.com/JetBrains/xodus) - Highly concurrent transactional schema-less and ACID-compliant embedded database.\n- [CosId](https://github.com/Ahoo-Wang/CosId) - Universal, flexible, high-performance distributed ID generator.\n\n### Date and Time\n\n_Libraries related to handling date and time._\n\n- [iCal4j](https://github.com/ical4j/ical4j) - Parse and build iCalendar [RFC 5545](https://tools.ietf.org/html/rfc5545) data models.\n- [Jollyday](https://github.com/svendiedrichsen/jollyday) - Determines the holidays for a given year, country/name and eventually state/region.\n- [ThreeTen-Extra](https://github.com/ThreeTen/threeten-extra) - Additional date-time classes that complement those in JDK 8.\n- [Time4J](https://github.com/MenoData/Time4J) - Advanced date and time library. (LGPL-2.1-only)\n\n### Dependency Injection\n\n_Libraries that help to realize the [Inversion of Control](https://en.wikipedia.org/wiki/Inversion_of_control) paradigm._\n\n- [Apache DeltaSpike](https://deltaspike.apache.org) - CDI extension framework.\n- [Avaje Inject](https://avaje.io/inject/) - Microservice-focused compile-time injection framework without reflection.\n- [Dagger](https://dagger.dev/) - Compile-time injection framework without reflection.\n- [Feather](https://github.com/zsoltherpai/feather) - Ultra-lightweight, JSR-330-compliant dependency injection library.\n- [Governator](https://github.com/Netflix/governator) - Extensions and utilities that enhance Google Guice.\n- [Guice](https://github.com/google/guice) - Lightweight and opinionated framework that completes Dagger.\n- [HK2](https://eclipse-ee4j.github.io/glassfish-hk2/) - Lightweight and dynamic dependency injection framework.\n- [JayWire](https://github.com/vanillasource/jaywire) - Lightweight dependency injection framework. (LGPL-3.0-only)\n\n### Development\n\n_Augmentation of the development process at a fundamental level._\n\n- [AspectJ](https://www.eclipse.org/aspectj/) - Seamless aspect-oriented programming extension.\n- [DCEVM](https://dcevm.github.io) - JVM modification that allows unlimited redefinition of loaded classes at runtime. (GPL-2.0-only)\n- [Faux Pas](https://github.com/zalando/faux-pas) - Library that simplifies error handling by circumventing the issue that none of the functional interfaces in the Java Runtime is allowed by default to throw checked exceptions.\n- [HotswapAgent](https://github.com/HotswapProjects/HotswapAgent) - Unlimited runtime class and resource redefinition. (GPL-2.0-only)\n- [JavaParser](https://github.com/javaparser/javaparser) - Parse, modify and generate Java code.\n- [JavaSymbolSolver](https://github.com/javaparser/javasymbolsolver) - Symbol solver.\n- [Manifold](https://github.com/manifold-systems/manifold) - Re-energizes Java with powerful features like type-safe metaprogramming, structural typing and extension methods.\n- [NoException](https://noexception.machinezoo.com) - Allows checked exceptions in functional interfaces and converts exceptions to Optional return.\n- [SneakyThrow](https://github.com/rainerhahnekamp/sneakythrow) - Ignores checked exceptions without bytecode manipulation. Can also be used inside Java 8 stream operations.\n- [Tail](https://nrktkt.github.io/tail/) - Enable infinite recursion using tail call optimization.\n\n### Distributed Applications\n\n_Libraries and frameworks for writing distributed and fault-tolerant applications._\n\n- [Apache Geode](https://geode.apache.org) - In-memory data management system that provides reliable asynchronous event notifications and guaranteed message delivery.\n- [Apache Storm](https://storm.apache.org) - Realtime computation system.\n- [Apache ZooKeeper](https://zookeeper.apache.org) - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems.\n- [Atomix](https://atomix.io) - Fault-tolerant distributed coordination framework.\n- [Axon](https://axoniq.io) - Framework for creating CQRS applications.\n- [Dropwizard Circuit Breaker](https://github.com/mtakaki/dropwizard-circuitbreaker) - Circuit breaker design pattern for Dropwizard. (GPL-2.0-only)\n- [Failsafe](https://github.com/jhalterman/failsafe) - Simple failure handling with retries and circuit breakers.\n- [Hazelcast](https://github.com/hazelcast/hazelcast) - Highly scalable in-memory datagrid with a free open-source version.\n- [JGroups](http://www.jgroups.org) - Toolkit for reliable messaging and cluster creation.\n- [Quasar](http://docs.paralleluniverse.co/quasar/) - Lightweight threads and actors for the JVM.\n- [resilience4j](https://github.com/resilience4j/resilience4j) - Functional fault tolerance library.\n- [OpenIG](https://github.com/OpenIdentityPlatform/OpenIG) - High-performance reverse proxy server with specialized session management and credential replay functionality.\n- [ScaleCube Services](https://github.com/scalecube/scalecube-services) - Embeddable Cluster-Membership library based on SWIM and gossip protocol.\n- [Zuul](https://github.com/Netflix/zuul) - Gateway service that provides dynamic routing, monitoring, resiliency, security, and more.\n\n### Distributed Transactions\n\n_Distributed transactions provide a mechanism for ensuring consistency of data updates in the presence of concurrent access and partial failures._\n\n- [Atomikos](https://www.atomikos.com) - Provides transactions for REST, SOA and microservices with support for JTA and XA.\n- [Bitronix](https://github.com/bitronix/btm) - Simple but complete implementation of the JTA 1.1 API.\n- [Narayana](https://narayana.io) - Provides support for traditional ACID and compensation transactions, also complies with JTA, JTS and other standards. (LGPL-2.1-only)\n- [Seata](https://github.com/seata/seata) - Delivers high performance and easy to use distributed transaction services under a microservices architecture.\n\n### Distribution\n\n_Tools that handle the distribution of applications in native formats._\n\n- [Artipie](https://github.com/artipie/artipie) - Binary artifact management toolkit which hosts them on the file system or S3.\n- [Boxfuse ![c]](https://boxfuse.com) - Deployment of JVM applications to AWS using the principles of immutable infrastructure.\n- [Capsule](https://github.com/puniverse/capsule) - Simple and powerful packaging and deployment. A fat JAR on steroids, or a \"Docker for Java\" that supports JVM-optimized containers.\n- [Central Repository](https://search.maven.org) - Largest binary component repository available as a free service to the open-source community. Default used by Apache Maven, and available in all other build tools.\n- [Cloudsmith ![c]](https://cloudsmith.io) - Fully managed package management SaaS with support for Maven/Gradle/SBT with a free tier.\n- [Getdown](https://github.com/threerings/getdown) - System for deploying Java applications to end-user computers and keeping them up to date. Developed as an alternative to Java Web Start.\n- [IzPack](http://izpack.org) - Setup authoring tool for cross-platform deployments.\n- [JavaPackager](https://github.com/fvarrui/JavaPackager) - Maven and Gradle plugin which provides an easy way to package Java applications in native Windows, macOS or GNU/Linux executables, and generate installers for them.\n- [jDeploy](https://www.jdeploy.com) - Deploy desktop apps as native Mac, Windows or Linux bundles.\n- [jlink.online](https://github.com/AdoptOpenJDK/jlink.online) - Builds optimized runtimes over HTTP.\n- [Nexus ![c]](https://www.sonatype.com) - Binary management with proxy and caching capabilities.\n- [packr](https://github.com/libgdx/packr) - Packs JARs, assets and the JVM for native distribution on Windows, Linux and macOS.\n- [really-executable-jars-maven-plugin](https://github.com/brianm/really-executable-jars-maven-plugin) - Maven plugin for making self-executing JARs.\n\n### Document Processing\n\n_Libraries that assist with processing office document formats._\n\n- [Apache POI](https://poi.apache.org) - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT).\n- [documents4j](https://documents4j.com/#/) - API for document format conversion using third-party converters such as MS Word.\n- [docx4j](https://www.docx4java.org/trac/docx4j) - Create and manipulate Microsoft Open XML files.\n- [fastexcel](https://github.com/dhatim/fastexcel) - High performance library to read and write large Excel (XLSX) worksheets.\n- [zerocell](https://github.com/creditdatamw/zerocell) - Annotation-based API for reading data from Excel sheets into POJOs with focus on reduced overhead.\n\n### Financial\n\n_Libraries related to the financial domain._\n\n- [Cassandre](https://github.com/cassandre-tech/cassandre-trading-bot) - Trading bot framework.\n- [Parity](https://github.com/paritytrading/parity) - Platform for trading venues.\n- [Philadelphia](https://github.com/paritytrading/philadelphia) - Low-latency financial information exchange.\n- [Square](https://github.com/square/connect-java-sdk) - Integration with the Square API.\n- [Stripe](https://github.com/stripe/stripe-java) - Integration with the Stripe API.\n- [ta4j](https://github.com/ta4j/ta4j) - Library for technical analysis.\n\n### Formal Verification\n\n_Formal-methods tools: proof assistants, model checking, symbolic execution, etc._\n\n- [CATG](https://github.com/ksen007/janala2) - Concolic unit testing engine. Automatically generates unit tests using formal methods.\n- [Checker Framework](https://checkerframework.org) - Pluggable type systems. Includes nullness types, physical units, immutability types and more. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [Daikon](https://plse.cs.washington.edu/daikon/) - Detects likely program invariants and generates JML specs based on those invariants.\n- [Java Path Finder (JPF)](https://github.com/javapathfinder/jpf-core) - JVM formal verification tool containing a model checker and more. Created by NASA.\n- [JMLOK 2.0](https://massoni.computacao.ufcg.edu.br/home/jmlok) - Detects inconsistencies between code and JML specification through feedback-directed random tests generation, and suggests a likely cause for each nonconformance detected. (GPL-3.0-only)\n- [KeY](https://www.key-project.org) - Formal software development tool that aims to integrate design, implementation, formal specification, and formal verification of object-oriented software as seamlessly as possible. Uses JML for specification and symbolic execution for verification. (GPL-2.0-or-later)\n- [OpenJML](http://www.openjml.org) - Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers. (GPL-2.0-only)\n\n### Functional Programming\n\n_Libraries that facilitate functional programming._\n\n- [Cyclops](https://github.com/aol/cyclops) - Monad and stream utilities, comprehensions, pattern matching, functional extensions for all JDK collections, future streams, trampolines and much more.\n- [derive4j](https://github.com/derive4j/derive4j) - Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching and morphisms. (GPL-3.0-only)\n- [Fugue](https://bitbucket.org/atlassian/fugue) - Functional extensions to Guava.\n- [Functional Java](http://www.functionaljava.org) - Implements numerous basic and advanced programming abstractions that assist composition-oriented development.\n- [jOOλ](https://github.com/jOOQ/jOOL) - Extension to Java 8 that aims to fix gaps in lambda by providing numerous missing types and a rich set of sequential Stream API additions.\n- [Packrat](https://github.com/jhspetersson/packrat) - Gatherers library for Java Stream API. Gatherers can enhance streams with custom intermediate operations.\n- [protonpack](https://github.com/poetix/protonpack) - Collection of stream utilities.\n- [StreamEx](https://github.com/amaembo/streamex) - Enhances Java 8 Streams.\n- [Vavr](https://www.vavr.io) - Functional component library that provides persistent data types and functional control structures.\n\n### Game Development\n\n_Frameworks that support the development of games._\n\n- [FXGL](https://almasb.github.io/FXGL/) - JavaFX Game Development Framework.\n- [JBox2D](http://www.jbox2d.org/) - Port of the renowned C++ 2D physics engine.\n- [jMonkeyEngine](https://jmonkeyengine.org) - Game engine for modern 3D development.\n- [libGDX](https://libgdx.com) - All-round cross-platform, high-level framework.\n- [Litiengine](https://litiengine.com/) - AWT-based, lightweight 2D game engine.\n- [LWJGL](https://www.lwjgl.org) - Robust framework that abstracts libraries like OpenGL/CL/AL.\n- [Mini2Dx](https://mini2dx.org) - Beginner-friendly, master-ready framework for rapidly prototyping and building 2D games.\n- [Void2D](https://github.com/xzripper/Void2D) - High-level 2D game engine with built-in physics based on Swing.\n- [vulkan4j](https://github.com/chuigda/vulkan4j) - Vulkan, OpenGL ES2 and GLFW Memory Allocator bindings.\n\n### Geospatial\n\n_Libraries for working with geospatial data and algorithms._\n\n- [Apache SIS](https://sis.apache.org) - Library for developing geospatial applications.\n- [ArcGIS Maps SDK for Java ![c]](https://github.com/Esri/arcgis-maps-sdk-java-samples/) - JavaFX library for adding mapping and GIS functionality to desktop apps.\n- [Geo](https://github.com/davidmoten/geo) - GeoHash utilities in Java.\n- [GeoTools](https://geotools.org) - Library that provides tools for geospatial data. (LGPL-2.1-only)\n- [GraphHopper](https://github.com/graphhopper/graphhopper) - Road-routing engine. Used as a Java library or standalone web service.\n- [H2GIS](http://www.h2gis.org) - Spatial extension of the H2 database. (LGPL-3.0-only)\n- [Jgeohash](https://astrapi69.github.io/jgeohash/) - Library for using the GeoHash algorithm.\n- [Mapsforge](https://github.com/mapsforge/mapsforge) - Map rendering based on OpenStreetMap data. (LGPL-3.0-only)\n- [Spatial4j](https://github.com/locationtech/spatial4j) - General-purpose spatial/geospatial library.\n\n### GUI\n\n_Libraries to create modern graphical user interfaces._\n\n- [JavaFX](https://wiki.openjdk.java.net/display/OpenJFX/Main) - Successor of Swing.\n- [Scene Builder](https://gluonhq.com/products/scene-builder/) - Visual layout tool for JavaFX applications.\n- [SnapKit](https://github.com/reportmill/SnapKit) - Modern Java UI library for both desktop and web.\n- [SWT](https://www.eclipse.org/swt/) - Graphical widget toolkit.\n\n### High Performance\n\n_Everything about high-performance computation, from collections to specific libraries._\n\n- [Agrona](https://github.com/real-logic/Agrona) - Data structures and utility methods that are common in high-performance applications.\n- [Disruptor](https://lmax-exchange.github.io/disruptor/) - Inter-thread messaging library.\n- [Eclipse Collections](https://github.com/eclipse/eclipse-collections) - Collections framework inspired by Smalltalk.\n- [fastutil](http://fastutil.di.unimi.it) - Fast and compact type-specific collections.\n- [HPPC](https://labs.carrotsearch.com/hppc.html) - Primitive collections.\n- [JCTools](https://github.com/JCTools/JCTools) - Concurrency tools currently missing from the JDK.\n- [Koloboke](https://github.com/leventov/Koloboke) - Carefully designed extension of the Java Collections Framework with primitive specializations and more.\n\n### HTTP Clients\n\n_Libraries that assist with creating HTTP requests and/or binding responses._\n\n- [Apache HttpComponents](https://hc.apache.org/) - Toolset of low-level Java components focused on HTTP and associated protocols.\n- [Async Http Client](https://github.com/AsyncHttpClient/async-http-client) - Asynchronous HTTP and WebSocket client library.\n- [Avaje Http Client](https://avaje.io/http-client) - Wrapper on JDK 11's HttpClient that adds Feign-like interface among other enhancements.\n- [Feign](https://github.com/OpenFeign/feign) - HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.\n- [Google HTTP Client](https://github.com/googleapis/google-http-java-client) - Pluggable HTTP transport abstraction with support for java.net.HttpURLConnection, Apache HTTP Client, Android, Google App Engine, XML, Gson, Jackson and Protobuf.\n- [methanol](https://github.com/mizosoft/methanol) - HTTP client extensions library.\n- [Retrofit](https://square.github.io/retrofit/) - Typesafe REST client.\n- [Ribbon](https://github.com/Netflix/ribbon) - Client-side IPC library that is battle-tested in the cloud.\n- [Riptide](https://github.com/zalando/riptide) - Client-side response routing for Spring's RestTemplate.\n- [unirest-java](https://github.com/Kong/unirest-java) - Simplified, lightweight HTTP client library.\n\n### Hypermedia Types\n\n_Libraries that handle serialization to hypermedia types._\n\n- [hate](https://github.com/blackdoor/hate) - Builds hypermedia-friendly objects according to HAL specification.\n- [JSON-LD](https://github.com/jsonld-java/jsonld-java) - JSON-LD implementation.\n- [Siren4J](https://github.com/eserating-chwy/siren4j) - Library for the Siren specification.\n- [Spring HATEOAS](https://github.com/spring-projects/spring-hateoas) - Standalone and Spring support for building hypermedia-based APIs using HAL, HAL FORMS, Collection+JSON, ALPS and UBER.\n\n### IDE\n\n_Integrated development environments that try to simplify several aspects of development._\n\n- [Eclipse](https://www.eclipse.org) - Established open-source project with support for lots of plugins and languages.\n- [IntelliJ IDEA ![c]](https://www.jetbrains.com/idea/) - Supports many JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector.\n- [jGRASP](https://www.jgrasp.org) - Created to provide software visualizations that work in conjunction with the debugger such as Control Structure Diagrams, UML class diagrams and Object Viewer.\n- [NetBeans](https://netbeans.apache.org) - Provides integration for several Java SE and EE features, from database access to HTML5.\n- [SnapCode](https://reportmill.com/SnapCode/) - Modern IDE for Java running in the browser, focused on education.\n- [Visual Studio Code](https://code.visualstudio.com/docs/languages/java) - Provides Java support for lightweight projects with a simple, modern workflow by using extensions from the internal marketplace.\n\n### Imagery\n\n_Libraries that assist with the creation, evaluation or manipulation of graphical images._\n\n- [Imgscalr](https://github.com/rkalla/imgscalr) - Simple, efficient and hardware-accelerated image-scaling library implemented in pure Java 2D.\n- [Tess4J](https://github.com/nguyenq/tess4j) - JNA wrapper for Tesseract OCR API.\n- [Thumbnailator](https://github.com/coobird/thumbnailator) - High-quality thumbnail generation library.\n- [TwelveMonkeys](https://github.com/haraldk/TwelveMonkeys) - Collection of plugins that extend the number of supported image file formats.\n- [ZXing](https://github.com/zxing/zxing) - Multi-format 1D/2D barcode image processing library.\n- [image-comparison](https://github.com/romankh3/image-comparison) - Library that compares 2 images with the same sizes and shows the differences visually by drawing rectangles. Some parts of the image can be excluded from the comparison.\n- [vips-ffm](https://github.com/lopcode/vips-ffm) - Comprehensive bindings for libvips, using Java's \"Foreign Function \u0026 Memory\" API.\n- [scrimage](https://sksamuel.github.io/scrimage) - Immutable, functional, and performant JVM library for manipulation of images.\n\n### Introspection\n\n_Libraries that help make the Java introspection and reflection API easier and faster to use._\n\n- [ClassGraph](https://github.com/classgraph/classgraph) - ClassGraph (formerly FastClasspathScanner) is an uber-fast, ultra-lightweight, parallelized classpath scanner and module scanner for Java, Scala, Kotlin and other JVM languages.\n- [jOOR](https://github.com/jOOQ/jOOR) - jOOR stands for jOOR Object Oriented Reflection. It is a simple wrapper for the java.lang.reflect package.\n- [Mirror](http://projetos.vidageek.net/mirror/mirror/) - Mirror was created to bring light to a simple problem, usually named ReflectionUtil, which is on almost all projects that rely on reflection to do advanced tasks.\n- [Objenesis](http://objenesis.org) - Allows dynamic instantiation without default constructor, e.g. constructors which have required arguments, side effects or throw exceptions.\n- [ReflectASM](https://github.com/EsotericSoftware/reflectasm) - ReflectASM is a very small Java library that provides high performance reflection by using code generation.\n- [Reflections](https://github.com/ronmamo/reflections) - Reflections scans your classpath, indexes the metadata, allows you to query it on runtime and may save and collect that information for many modules within your project.\n\n### Job Scheduling\n\n_Libraries for scheduling background jobs._\n\n- [JobRunr](https://github.com/jobrunr/jobrunr) - Job scheduling library which utilizes lambdas for fire-and-forget, delayed and recurring jobs. Guarantees execution by single scheduler instance using optimistic locking. Has features for persistence, minimal dependencies and is embeddable.\n- [Quartz](https://github.com/quartz-scheduler/quartz) - Feature-rich, open source job scheduling library that can be integrated within virtually any Java application.\n- [Sundial](https://github.com/knowm/Sundial) - Lightweight framework to simply define jobs, define triggers and start the scheduler.\n- [Wisp](https://github.com/Coreoz/Wisp) - Simple library with minimal footprint and straightforward API.\n- [db-scheduler](https://github.com/kagkarlsson/db-scheduler) - Persistent and cluster-friendly scheduler.\n- [easy-batch](https://github.com/j-easy/easy-batch) - Set up batch jobs with simple processing pipelines. Records are read in sequence from a data source, processed in pipeline and written in batches to a data sink.\n- [shedlock](https://github.com/lukas-krecan/ShedLock) - Makes sure that your scheduled tasks are executed at most once at the same time. If a task is being executed on one node, it acquires a lock which prevents execution of the same task from another node or thread.\n\n### JSON\n\n_Libraries for serializing and deserializing JSON to and from Java objects._\n\n- [Avaje Jsonb](https://avaje.io/jsonb/) - Reflection-free Json binding via source code generation with Jackson-like annotations.\n- [DSL-JSON](https://github.com/ngs-doo/dsl-json) - JSON library with advanced compile time databinding.\n- [Genson](http://genson.io) - Powerful and easy-to-use Java-to-JSON conversion library.\n- [Gson](https://github.com/google/gson) - Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.\n- [HikariJSON](https://github.com/brettwooldridge/HikariJSON) - High-performance JSON parser, 2x faster than Jackson.\n- [jackson-modules-java8](https://github.com/FasterXML/jackson-modules-java8) - Set of Jackson modules for Java 8 datatypes and features.\n- [Jackson-datatype-money](https://github.com/zalando/jackson-datatype-money) - Open-source Jackson module to support JSON serialization and deserialization of JavaMoney data types.\n- [Jackson](https://github.com/FasterXML/jackson) - Similar to GSON, but offers performance gains if you need to instantiate the library more often.\n- [JSON-io](https://github.com/jdereg/json-io) - Convert Java to JSON. Convert JSON to Java. Pretty print JSON. Java JSON serializer.\n- [jsoniter](http://jsoniter.com) - Fast and flexible library with iterator and lazy parsing API.\n- [LoganSquare](https://github.com/bluelinelabs/LoganSquare) - JSON parsing and serializing library based on Jackson's streaming API. Outperforms GSON \u0026 Jackson's library.\n- [Moshi](https://github.com/square/moshi) - Modern JSON library, less opinionated and uses built-in types like List and Map.\n- [Yasson](https://github.com/eclipse-ee4j/yasson) - Binding layer between classes and JSON documents similar to JAXB.\n- [fastjson](https://github.com/alibaba/fastjson) - Very fast processor with no additional dependencies and full data binding.\n- [Jolt](https://github.com/bazaarvoice/jolt) - JSON to JSON transformation tool.\n- [JsonPath](https://github.com/json-path/JsonPath) - Extract data from JSON using XPATH-like syntax.\n- [JsonSurfer](https://github.com/jsurfer/JsonSurfer) - Streaming JsonPath processor dedicated to processing big and complicated JSON data.\n\n### JVM and JDK\n\n_Current implementations of the JVM/JDK._\n\n- [Which JDK](https://whichjdk.com/) - Overview of common JVMs with pros and cons.\n- [Adopt Open JDK](https://adoptopenjdk.net) - Community-driven OpenJDK builds, including both HotSpot and OpenJ9.\n- [Corretto](https://aws.amazon.com/corretto/) - No-cost, multiplatform, production-ready distribution of OpenJDK by Amazon. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [Dragonwell8](https://github.com/alibaba/dragonwell8) - Downstream version of OpenJDK optimized for online e-commerce, financial, logistics applications.\n- [Graal](https://github.com/oracle/graal) - Polyglot embeddable JVM. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [Liberica JDK](https://bell-sw.com) - Built from OpenJDK, thoroughly tested and passed the JCK. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [OpenJ9](https://github.com/eclipse/openj9) - High performance, enterprise-calibre, flexibly licensed, openly-governed cross-platform JVM extending and augmenting the runtime technology components from the Eclipse OMR and OpenJDK project.\n- [Open JDK](https://openjdk.java.net) - Open JDK community home. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [ParparVM](https://github.com/codenameone/CodenameOne/tree/master/vm) - VM with non-blocking, concurrent GC for iOS. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [RedHat Open JDK](https://developers.redhat.com/products/openjdk/overview) - RedHat's OpenJDK distribution. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [SAP Machine](https://sap.github.io/SapMachine/) - SAP's no-cost, rigorously tested and JCK-verified OpenJDK friendly fork. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [Zulu](https://www.azul.com/products/zulu-community/) - OpenJDK builds for Windows, Linux, and macOS. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [Microsoft JDK](https://github.com/microsoft/openjdk) - Microsoft Build of OpenJDK, Free, Open Source, Freshly Brewed!\n\n### Logging\n\n_Libraries that log the behavior of an application._\n\n- [Apache Log4j 2](https://logging.apache.org/log4j/) - Complete rewrite with a powerful plugin and configuration architecture.\n- [Echopraxia](https://github.com/tersesystems/echopraxia) - API designed around structured logging, rich context, and conditional logging. There are Logback and Log4J2 implementations, but Echopraxia's API is completely dependency-free, meaning it can be implemented with any logging API.\n- [Graylog](https://www.graylog.org) - Open-source aggregator suited for extended role and permission management. (GPL-3.0-only)\n- [Kibana](https://www.elastic.co/kibana) - Analyzes and visualizes log files. Some features require payment.\n- [Logback](http://logback.qos.ch) - Robust logging library with interesting configuration options via Groovy.\n- [Logbook](https://github.com/zalando/logbook) - Extensible, open-source library for HTTP request and response logging.\n- [Logstash](https://www.elastic.co/logstash) - Tool for managing log files.\n- [p6spy](https://github.com/p6spy/p6spy) - Enables logging for all JDBC transactions without changes to the code.\n- [SLF4J](http://www.slf4j.org) - Abstraction layer/simple logging facade.\n- [tinylog](https://tinylog.org/v2/) - Lightweight logging framework with static logger class.\n- [OpenTracing Toolbox](https://github.com/zalando/opentracing-toolbox) - Collection of libraries that build on top of OpenTracing and provide extensions and plugins to existing instrumentations.\n- [Flogger](https://google.github.io/flogger/) - Flogger is a fluent logging API for Java. It supports a wide variety of features, and has many benefits over existing logging APIs.\n\n### Machine Learning\n\n_Tools that provide specific statistical algorithms for learning from data._\n\n- [Apache Flink](https://flink.apache.org) - Fast, reliable, large-scale data processing engine.\n- [Apache Mahout](https://mahout.apache.org) - Scalable algorithms focused on collaborative filtering, clustering and classification.\n- [DatumBox](http://www.datumbox.com) - Provides several algorithms and pre-trained models for natural language processing.\n- [Deeplearning4j](https://deeplearning4j.org) - Distributed and multi-threaded deep learning library.\n- [DJL](https://djl.ai) - High-level and engine-agnostic framework for deep learning.\n- [H2O ![c]](https://www.h2o.ai) - Analytics engine for statistics over big data.\n- [Intelligent java](https://github.com/Barqawiz/IntelliJava) - Seamlessly integrate with remote deep learning and language models programmatically.\n- [JSAT](https://github.com/EdwardRaff/JSAT) - Algorithms for pre-processing, classification, regression, and clustering with support for multi-threaded execution. (GPL-3.0-only)\n- [m2cgen](https://github.com/BayesWitnesses/m2cgen) - CLI tool to transpile models into native code.\n- [Neureka](https://github.com/Gleethos/neureka) - A lightweight, platform independent, OpenCL accelerated nd-array/tensor library.\n- [oj! Algorithms](https://www.ojalgo.org/) - High-performance mathematics, linear algebra and optimisation needed for data science, machine learning and scientific computing.\n- [Oryx 2](https://github.com/OryxProject/oryx) - Framework for building real-time, large-scale machine learning applications. Includes end-to-end applications for collaborative filtering, classification, regression, and clustering.\n- [Siddhi](https://github.com/siddhi-io/siddhi) - Cloud native streaming and complex event processing engine.\n- [Smile](https://github.com/haifengl/smile) - Statistical Machine Intelligence and Learning Engine provides a set of machine learning algorithms and a visualization library.\n- [Tribuo](https://tribuo.org/) - Provides tools for classification, regression, clustering, model development and interfaces with other libraries such as scikit-learn, pytorch and TensorFlow.\n- [Weka](https://www.cs.waikato.ac.nz/ml/weka/) - Collection of algorithms for data mining tasks ranging from pre-processing to visualization. (GPL-3.0-only)\n\n### Messaging\n\n_Tools that help send messages between clients to ensure protocol independency._\n\n- [Aeron](https://github.com/real-logic/Aeron) - Efficient, reliable, unicast and multicast message transport.\n- [Apache ActiveMQ](https://activemq.apache.org) - Message broker that implements JMS and converts synchronous to asynchronous communication.\n- [Apache Camel](https://camel.apache.org) - Glues together different transport APIs via Enterprise Integration Patterns.\n- [Apache Kafka](https://kafka.apache.org) - High-throughput distributed messaging system.\n- [Apache Pulsar](https://pulsar.apache.org) - Distributed pub/sub-messaging system.\n- [Apache RocketMQ](https://rocketmq.apache.org) - Fast, reliable, and scalable distributed messaging platform.\n- [Apache Qpid](https://qpid.apache.org) - Apache Qpid makes messaging tools that speak AMQP and support many languages and platforms.\n- [AutoMQ](https://github.com/AutoMQ/automq-for-kafka) - AutoMQ is a cloud-native, serverless reinvented Kafka that is easily scalable, manage-less and cost-effective.\n- [Deezpatch](https://github.com/joel-jeremy/deezpatch) - Simple, lightweight, and performant dispatch library for decoupling messages (requests and events) and message handlers.\n- [EventBus](https://github.com/greenrobot/EventBus) - Simple publish/subscribe event bus.\n- [Hermes](http://hermes.allegro.tech) - Fast and reliable message broker built on top of Kafka.\n- [JeroMQ](https://github.com/zeromq/jeromq) - Implementation of ZeroMQ.\n- [Nakadi](https://github.com/zalando/nakadi) - Provides a RESTful API on top of Kafka.\n- [RabbitMQ Java client](https://github.com/rabbitmq/rabbitmq-java-client) - RabbitMQ client.\n- [Smack](https://github.com/igniterealtime/Smack) - Cross-platform XMPP client library.\n- [NATS client](https://github.com/nats-io/nats.java) - NATS client.\n\n### Microservice\n\n_Tools for creating and managing microservices._\n\n- [ActiveRPC](https://rpc.activej.io) - Lightweight and fast library for complex high-load distributed applications and Memcached-like solutions.\n- [Armeria](https://github.com/line/armeria) - Asynchronous RPC/REST client/server library built on top of Java 8, Netty, HTTP/2, Thrift and gRPC.\n- [consul-api](https://github.com/Ecwid/consul-api) - Client for the Consul API: a distributed, highly available and datacenter-aware registry/discovery service.\n- [Eureka](https://github.com/Netflix/eureka) - REST-based service registry for resilient load balancing and failover.\n- [Helidon](https://helidon.io) - Two-style approach for writing microservices: Functional-reactive and as an implementation of MicroProfile.\n- [JDA](https://github.com/DV8FromTheWorld/JDA) - Wrapping of the Discord REST API and its WebSocket events.\n- [KeenType](https://github.com/DaveJarvis/KeenType) - Modernized version of a Java-based implementation of the New Typesetting System, which was heavily based on Donald E. Knuth's original TeX.\n- [kubernetes-client](https://github.com/fabric8io/kubernetes-client) - Client provides access to the full Kubernetes \u0026 OpenShift REST APIs via a fluent DSL.\n- [Micronaut](https://micronaut.io) - Modern full-stack framework with focus on modularity, minimal memory footprint and startup time.\n- [Nacos](https://nacos.io) - Dynamic service discovery, configuration and service management platform for building cloud native applications.\n- [OpenAI-Java](https://github.com/TheoKanning/openai-java) - Java libraries for using OpenAI's GPT-3 API.\n- [Quarkus](https://quarkus.io) - Kubernetes stack tailored for the HotSpot and Graal VM.\n- [Sentinel](https://github.com/alibaba/Sentinel) - Flow control component enabling reliability, resilience and monitoring for microservices.\n\n### Miscellaneous\n\n_Everything else._\n\n- [CQEngine](https://github.com/npgall/cqengine) - Ultra-fast, SQL-like queries on Java collections.\n- [Design Patterns](https://github.com/iluwatar/java-design-patterns) - Implementation and explanation of the most common design patterns.\n- [FF4J](https://github.com/ff4j/ff4j) - Feature Flags for Java.\n- [FizzBuzz Enterprise Edition](https://github.com/EnterpriseQualityCoding/FizzBuzzEnterpriseEdition) - No-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes. (No explicit license)\n- [IP2Location.io Java SDK](https://github.com/ip2location/ip2location-io-java) - Wrapper for the IP2Location.io Geolocation API and the IP2WHOIS domain WHOIS API.\n- [ISBN core](https://github.com/ladutsko/isbn-core) - A small library that contains a representation object of ISBN-10 and ISBN-13 and tools to parse, validate and format one.\n- [J2ObjC](https://github.com/google/j2objc) - Java-to-Objective-C translator for porting Android libraries to iOS.\n- [JBake](https://jbake.org) - Static website generator.\n- [JBot](https://github.com/rampatra/jbot) - Framework for building chatbots. (GPL-3.0-only)\n- [JCuda](http://jcuda.org) - JCuda offers Java bindings for CUDA and CUDA-related libraries.\n- [JEmoji](https://github.com/felldo/JEmoji) - An auto-generated emoji library that provides type-safe direct access to emojis and alias support for Discord, Slack, GitHub and many more features.\n- [Jimfs](https://github.com/google/jimfs) - In-memory file system.\n- [JObfuscator![c]](https://www.pelock.com/products/jobfuscator) - Source code obfuscator.\n- [Joda-Money](https://www.joda.org/joda-money/) - Basic currency and money classes and algorithms not provided by the JDK.\n- [jOOX](https://github.com/jooq/joox) - Simple wrapper for the org.w3c.dom package, to allow for fluent XML document creation and manipulation with an API inspired by jQuery.\n- [JPad](http://jpad.io) - Snippet runner.\n- [jsweet](https://github.com/cincheo/jsweet) - Source transpiler to TypeScript/JavaScript.\n- [Maven Wrapper](https://github.com/takari/maven-wrapper) - Analogue of Gradle Wrapper for Maven, allows building projects without installing maven.\n- [Membrane Service Proxy](https://github.com/membrane/service-proxy) - Open-source, reverse-proxy framework.\n- [MinimalFTP](https://github.com/Guichaguri/MinimalFTP) - Lightweight, small and customizable FTP server.\n- [LittleProxy](https://github.com/adamfisk/LittleProxy) - High performance HTTP proxy atop Netty's event-based networking library.\n- [Modern Java - A Guide to Java 8](https://github.com/winterbe/java8-tutorial) - Popular Java 8 guide.\n- [Modernizer](https://github.com/gaul/modernizer-maven-plugin) - Detect uses of legacy Java APIs.\n- [OctoLinker](https://github.com/OctoLinker/OctoLinker) - Browser extension which allows to navigate through code on GitHub more efficiently.\n- [OpenRefine](http://openrefine.org) - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases.\n- [PipelinR](https://github.com/sizovs/pipelinr) - Small utility library for using handlers and commands with pipelines.\n- [Polyglot for Maven](https://github.com/takari/polyglot-maven) - Extensions for Maven 3.3.1+ that allows writing the POM model in dialects other than XML.\n- [RR4J](https://github.com/Kartikvk1996/RR4J) - RR4J is a tool that records java bytecode execution and later allows developers to replay locally.\n- [Simple Java Mail](https://github.com/bbottema/simple-java-mail) - Mailing with a clean and fluent API.\n- [Smooks](https://github.com/smooks/smooks) - Framework for fragment-based message processing. (Apache-2.0 OR LGPL-3.0-or-later)\n- [Svix](https://github.com/svix/svix-webhooks/tree/main/java) - Library for the Svix API to send webhooks and verify signatures.\n- [Togglz](https://www.togglz.org) - Implementation of the Feature Toggles pattern.\n- [TypeTools](https://github.com/jhalterman/typetools) - Tools for resolving generic types.\n- [webcam-capture](https://github.com/sarxos/webcam-capture) - Library for using built-in and external webcams directly in Java.\n- [XMLBeam](https://github.com/SvenEwald/xmlbeam) - Processes XML by using annotations or XPath within code.\n- [yGuard](https://github.com/yWorks/yGuard) - Obfuscation via renaming and shrinking.\n\n### Mobile Development\n\n_Tools for creating or managing mobile applications._\n\n- [Codename One](https://www.codenameone.com) - Cross-platform solution for writing native mobile apps. (GPL-2.0-only WITH Classpath-exception-2.0)\n- [MobileUI](https://mobileui.dev) - Cross-platform framework for developing mobile apps with native UI in Java and Kotlin.\n- [Multi-OS Engine](https://multi-os-engine.org) - Open-source, cross-platform engine to develop native mobile (iOS, Android, etc.) apps.\n\n### Monitoring\n\n_Tools that observe/monitor applications in production by providing telemetry._\n\n- [Apitally](https://github.com/apitally/apitally-java) - Simple, privacy-focused API monitoring, analytics and request logging for Spring Boot apps.\n- [Automon](https://github.com/stevensouza/automon) - Combines the power of AOP with monitoring and/or logging tools.\n- [Datadog ![c]](https://github.com/DataDog/dd-trace-java) - Modern monitoring \u0026 analytics.\n- [Dropwizard Metrics](https://github.com/dropwizard/metrics) - Expose metrics via JMX or HTTP and send them to a database.\n- [Failsafe Actuator](https://github.com/zalando/failsafe-actuator) - Out of the box monitoring of Failsafe Circuit Breaker in Spring-Boot environment.\n- [Glowroot](https://glowroot.org) - Open-source Java APM.\n- [HertzBeat](https://github.com/dromara/hertzbeat) - Real-time monitoring system with custom-monitor and agentless.\n- [hippo4j](https://github.com/opengoofy/hippo4j/blob/develop/README-EN.md) - Dynamic and observable thread pool framework.\n- [inspectIT](https://www.inspectit.rocks) - Captures detailed run-time information via hooks that can be changed on the fly. It supports tracing over multiple systems via the OpenTracing API and can correlate the data with end user monitoring.\n- [Instrumental ![c]](https://instrumentalapp.com) - Real-time Java application performance monitoring. A commercial service with free development accounts.\n- [Jaeger client](https://github.com/jaegertracing/jaeger-client-java) - Jaeger client.\n- [JavaMelody](https://github.com/javamelody/javamelody) - Performance monitoring and profiling.\n- [jmxtrans](https://github.com/jmxtrans/jmxtrans) - Connect to multiple JVMs and query them for their attributes via JMX. Its query language is based on JSON, which allows non-Java programmers to access the JVM attributes. Supports different output writes, including Graphite, Ganglia, and StatsD.\n- [Jolokia](https://jolokia.org) - JMX over REST.\n- [Micrometer](https://github.com/micrometer-metrics/micrometer) - Vendor-neutral metrics/observability facade for the most popular metrics/observability libraries.\n- [Micrometer Tracing](https://github.com/micrometer-metrics/tracing) - Vendor-neutral distributed tracing facade for the most popular tracer libraries.\n- [nudge4j](https://github.com/lorenzoongithub/nudge4j) - Remote developer console from the browser for Java 8 via bytecode injection.\n- [OpenTelemetry](https://github.com/open-telemetry/opentelemetry-java) - Instrument, generate, collect, and export telemetry data to help you analyze your software’s performance and behavior.\n- [Pinpoint](https://github.com/naver/pinpoint) - Open-source APM tool.\n- [Prometheus](https://github.com/prometheus/client_java) - Provides a multi-dimensional data model, DSL, autonomous server nodes and much more.\n- [Sentry ![c]](https://github.com/getsentry/sentry-java) - Integration with [Sentry](https://github.com/getsentry/sentry), an application error tracking and performance analysis platform.\n- [SPM ![c]](https://github.com/sematext/sematext-agent-java) - Performance monitor with distributing transaction tracing for JVM apps.\n- [Stagemonitor](https://github.com/stagemonitor/stagemonitor) - Open-source performance monitoring and transaction tracing for JVM apps.\n- [Sysmon](https://github.com/palantir/Sysmon) - Lightweight platform monitoring tool for Java VMs.\n- [zipkin](https://zipkin.io) - Distributed tracing system which gathers timing data needed to troubleshoot latency problems in microservice architectures.\n\n### Native\n\n_For working with platform-specific native libraries._\n\n- [Aparapi](https://github.com/Syncleus/aparapi) - Converts bytecode to OpenCL which allows execution on GPUs.\n- [JavaCPP](https://github.com/bytedeco/javacpp) - Provides efficient and easy access to native C++.\n- [JNA](https://github.com/java-native-access/jna) - Work with native libraries without writing JNI. Also provides interfaces to common system libraries.\n- [JNR](https://github.com/jnr/jnr-ffi) - Work with native libraries without writing JNI. Also provides interfaces to common system libraries. Same goals as JNA, but faster, and serves as the basis for the upcoming [Project Panama](http://openjdk.java.net/projects/panama).\n- [native-lib-loader](https://github.com/scijava/native-lib-loader) - Native library loader for extracting and loading native libraries from Java.\n\n### Natural Language Processing\n\n_Libraries that specialize in processing text._\n\n- [CogCompNLP](https://github.com/CogComp/cogcomp-nlp) - Provides common annotators for plain text input. (Research and Academic Use License)\n- [CoreNLP](https://nlp.stanford.edu/software/corenlp.shtml) - Provides a set of fundamental tools for tasks like tagging, named entity recognition, and sentiment analysis. (GPL-3.0-or-later)\n- [DKPro](https://dkpro.github.io) - Collection of reusable NLP tools for linguistic pre-processing, machine learning, lexical resources, etc.\n- [Hypherator](https://github.com/ejossev/hypherator-java) - Java hyphenation library with iterator-like interface. Can be used out-of-the box - dictionaries for multiple languages are bundled in. \n- [LingPipe](http://alias-i.com/lingpipe/) - Toolkit for tasks ranging from POS tagging to sentiment analysis.\n\n### Networking\n\n_Libraries for building network servers._\n\n- [Commons-networking](https://github.com/CiscoSE/commons-networking) - Client for server-sent events (SSE).\n- [Comsat](https://github.com/puniverse/comsat) - Integrates standard Java web-related APIs with Quasar fibers and actors.\n- [Dubbo](https://github.com/apache/dubbo) - High-performance RPC framework.\n- [Grizzly](https://javaee.github.io/grizzly/) - NIO framework. Used as a network layer in Glassfish.\n- [gRPC](https://github.com/grpc/grpc-java) - RPC framework based on protobuf and HTTP/2.\n- [KryoNet](https://github.com/EsotericSoftware/kryonet) - Provides a clean and simple API for efficient TCP and UDP client/server network communication using NIO and Kryo.\n- [MINA](https://mina.apache.org) - Abstract, event-driven async I/O API for network operations over TCP/IP and UDP/IP via Java NIO.\n- [Netty](https://netty.io) - Framework for building high-performance network applications.\n- [Drift](https://github.com/airlift/drift) - Easy-to-use, annotation-based library for creating Thrift clients and serializable types.\n- [ServiceTalk](https://github.com/apple/servicetalk) - Framework built on Netty with APIs tailored to specific protocols and support for multiple programming paradigms.\n- [sshj](https://github.com/hierynomus/sshj) - Programmatically use SSH, SCP or SFTP.\n- [TLS Channel](https://github.com/marianobarrios/tls-channel) - Implements a ByteChannel interface over SSLEngine, enabling easy-to-use (socket-like) TLS.\n- [Undertow](http://undertow.io) - Web server providing both blocking and non-blocking APIs based on NIO. Used as a network layer in WildFly. (LGPL-2.1-only)\n- [urnlib](https://github.com/slub/urnlib) - Represent, parse and encode URNs, as in RFC 2141. (GPL-3.0-only)\n- [Fluency](https://github.com/komamitsu/fluency) - High throughput data ingestion logger to Fluentd and Fluent Bit.\n\n### ORM\n\n_APIs that handle the persistence of objects._\n\n- [Apache Cayenne](https://cayenne.apache.org) - Provides a clean, static API for data access. Also includes a GUI Modeler for working with database mappings, and DB reverse engineering and generation.\n- [Doma](https://github.com/domaframework/doma) - Database access framework that verifies and generates source code at compile time using annotation processing as well as native SQL templates called two-way SQL.\n- [Ebean](https://ebean.io) - Provides simple and fast data access.\n- [EclipseLink](https://www.eclipse.org/eclipselink/) - Supports a number of persistence standards: JPA, JAXB, JCA and SDO.\n- [Hibernate](http://hibernate.org/orm/) - Robust and widely used, with an active community. (LGPL-2.1-only)\n- [MyBatis](https://github.com/mybatis/mybatis-3) - Couples objects with stored procedures or SQL statements.\n- [MyBatis-Plus](https://github.com/baomidou/mybatis-plus) - A powerful enhanced toolkit of MyBatis for simplifying development.\n- [ObjectiveSql](https://github.com/braisdom/ObjectiveSql) - ActiveRecord ORM for rapid development and convention over configuration.\n- [Permazen](https://github.com/permazen/permazen) - Language-natural persistence layer.\n- [SimpleFlatMapper](https://github.com/arnaudroger/SimpleFlatMapper) - Simple database and CSV mapper.\n\n### PaaS\n\n_Java platform as a service._\n\n- [AWS Elastic Beanstalk ![c]](https://aws.amazon.com/elasticbeanstalk/) - AWS-based, with support for Tomcat and Jetty.\n- [AWS Lambda ![c]](https://aws.amazon.com/lambda/) - Serverless computation.\n- [Google Cloud ![c]](https://cloud.google.com) - Google's cloud infrastructure.\n- [Heroku ![c]](https://www.heroku.com) - Abstract computing environments.\n- [Microsoft Azure ![c]](https://azure.microsoft.com/en-us/) - Microsoft's cloud infrastructure.\n- [OpenShift ![c]](https://www.openshift.com) - Provides additionally an on-premise solution.\n\n### Pathfinding\n\n_Algorithms and libraries for finding routes in graphs and spatial environments._\n\n- [Pathetic](https://github.com/bsommerfeld/pathetic) - A highly configurable 3D A* pathfinding library that uses specific optimizations for high performance.\n\n### PDF\n\n_Tools to help with PDF files._\n\n- [Apache FOP](https://xmlgraphics.apache.org/fop/) - Creates PDFs from XSL-FO.\n- [Apache PDFBox](https://pdfbox.apache.org) - Toolbox for creating and manipulating PDFs.\n- [Dynamic Jasper](https://intive-fdv.github.io/DynamicJasper/) - Abstraction layer to JasperReports. (LGPL-3.0-only)\n- [DynamicReports](https://github.com/dynamicreports/dynamicreports) - Simplifies JasperReports. (LGPL-3.0-only)\n- [Eclipse BIRT](https://www.eclipse.org/birt) - Report engine for creating PDF and other formats (DOCX, XLSX, HTML, etc) using Eclipse-based visual editor.\n- [flyingsaucer](https://github.com/flyingsaucerproject/flyingsaucer) - XML/XHTML and CSS 2.1 renderer. (LGPL-2.1-or-later)\n- [iText ![c]](https://itextpdf.com/en) - Creates PDF files programmatically.\n- [JasperReports](https://community.jaspersoft.com/project/jasperreports-library) - Complex reporting engine. (LGPL-3.0-only)\n- [Open HTML to PDF](https://github.com/danfickle/openhtmltopdf) - Properly supports modern PDF standards based on flyingsaucer and Apache PDFBox.\n- [OpenPDF](https://github.com/LibrePDF/OpenPDF) - Open-source iText fork. (LGPL-3.0-only \u0026 MPL-2.0)\n- [Tabula](https://github.com/tabulapdf/tabula-java) - Extracts tables from PDF files.\n\n### Performance analysis\n\n_Tools for performance analysis, profiling and benchmarking._\n\n- [fastThread ![c]](https://fastthread.io) - Analyze and visualize thread dumps with a free cloud-based upload interface.\n- [GCeasy ![c]](https://gceasy.io) - Tool to analyze and visualize GC logs. It provides a free cloud-based upload interface.\n- [honest-profiler](https://github.com/jvm-profiling-tools/honest-profiler) - Low-overhead, bias-free sampling profiler.\n- [jHiccup](https://github.com/giltene/jHiccup) - Logs and records platform JVM stalls.\n- [JITWatch](https://github.com/AdoptOpenJDK/jitwatch) - Analyze the JIT compiler optimisations made by the HotSpot JVM.\n- [JMH](http://openjdk.java.net/projects/code-tools/jmh/) - Harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targeting the JVM. (GPL-2.0 only WITH Classpath-exception-2.0)\n- [LatencyUtils](https://github.com/LatencyUtils/LatencyUtils) - Utilities for latency measurement and reporting.\n\n### Platform\n\n_Frameworks that are suites of multiple libraries encompassing several categories._\n\n#### Apache Commons\n\n- [BCEL](http://commons.apache.org/proper/commons-bcel/) - Byte Code Engineering Library - analyze, create, and manipulate Java class files.\n- [BeanUtils](http://commons.apache.org/proper/commons-beanutils/) - Easy-to-use wrappers around the Java reflection and introspection APIs.\n- [BeanUtils2](http://commons.apache.org/sandbox/commons-beanutils2/) - Redesign of Commons BeanUtils.\n- [BSF](http://commons.apache.org/proper/commons-bsf/) - Bean Scripting Framework - interface to scripting languages, including JSR-223.\n- [Chain](http://commons.apache.org/proper/commons-chain/) - Chain of Responsibility pattern implementation.\n- [ClassScan](http://commons.apache.org/sandbox/commons-classscan/) - Find Class interfaces, methods, fields, and annotations without loading.\n- [CLI](http://commons.apache.org/proper/commons-cli/) - Command-line arguments parser.\n- [CLI2](http://commons.apache.org/sandbox/commons-cli2/) - Redesign of Commons CLI.\n- [Codec](http://commons.apache.org/proper/commons-codec/) - General encoding/decoding algorithms, e.g. phonetic, base64 or URL.\n- [Collections](http://commons.apache.org/proper/commons-collections/) - Extends or augments the Java Collections Framework.\n- [Compress](http://commons.apache.org/proper/commons-compress/) - Defines an API for working with tar, zip and bzip2 files.\n- [Configuration](http://commons.apache.org/proper/commons-configuration/) - Reading of configuration/preferences files in various formats.\n- [Convert](http://commons.apache.org/sandbox/commons-convert/) - Commons-Convert aims to provide a single library dedicated to the task of converting an object of one type to another.\n- [CSV](http://commons.apache.org/proper/commons-csv/) - Component for reading and writing comma separated value files.\n- [Daemon](http://commons.apache.org/proper/commons-daemon/) - Alternative invocation mechanism for unix-daemon-like java code.\n- [DBCP](http://commons.apache.org/proper/commons-dbcp/) - Database connection pooling services.\n- [DbUtils](http://commons.apache.org/proper/commons-dbutils/) - JDBC helper library.\n- [Digester](http://commons.apache.org/proper/commons-digester/) - XML-to-Java-object mapping utility.\n- [Email](http://commons.apache.org/proper/commons-email/) - Library for sending e-mail from Java.\n- [Exec](http://commons.apache.org/proper/commons-exec/) - API for dealing with external process execution and environment management in Java.\n- [FileUpload](http://commons.apache.org/proper/commons-fileupload/) - File upload capability for your servlets and web applications.\n- [Finder](http://commons.apache.org/sandbox/commons-finder/) - Java library inspired by the UNIX find command.\n- [Flatfile](http://commons.apache.org/sandbox/commons-flatfile/) - Java library for working with flat data structures.\n- [Functor](http://commons.apache.org/proper/commons-functor/) - Function that can be manipulated as an object, or an object representing a single, generic function.\n- [Graph](http://commons.apache.org/sandbox/commons-graph/) - General purpose graph APIs and algorithms.\n- [I18n](http://commons.apache.org/sandbox/commons-i18n/) - Adds the feature of localized message bundles that consist of one or many localized texts that belong together.\n- [Id](http://commons.apache.org/sandbox/commons-id/) - Id is a component used to generate identifiers.\n- [Imaging](http://commons.apache.org/proper/commons-imaging/) - Image library.\n- [IO](http://commons.apache.org/proper/commons-io/) - Collection of I/O utilities.\n- [Javaflow](http://commons.apache.org/sandbox/commons-javaflow/) - Continuation implementation to capture the state of the application.\n- [JCI](http://commons.apache.org/proper/commons-jci/) - Java Compiler Interface.\n- [JCS](http://commons.apache.org/proper/commons-jcs/) - Java Caching System.\n- [Jelly](http://commons.apache.org/proper/commons-jelly/) - XML based scripting and processing engine.\n- [Jexl](http://commons.apache.org/proper/commons-jexl/) - Expression language which extends the Expression Language of the JSTL.\n- [JNet](http://commons.apache.org/sandbox/commons-jnet/) - JNet allows to use dynamically register url stream handlers through the java.net API.\n- [JXPath](http://commons.apache.org/proper/commons-jxpath/) - Utilities for manipulating Java Beans using the XPath syntax.\n- [Lang](http://commons.apache.org/proper/commons-lang/) - Provides extra functionality for classes in java.lang.\n- [Logging](https://commons.apache.org/proper/commons-logging/) - Wrapper around a variety of logging API implementations.\n- [Math](http://commons.apache.org/proper/commons-math/) - Lightweight, self-contained mathematics and statistics components.\n- [Monitoring](http://commons.apache.org/sandbox/commons-monitoring/) - Monitoring aims to provide a simple but extensible monitoring solution for Java applications.\n- [Nabla](http://commons.apache.org/sandbox/commons-nabla/) - Nabla provides automatic differentiation classes that can generate derivative of any function implemented in the Java language.\n- [Net](http://commons.apache.org/proper/commons-net/) - Collection of network utilities and protocol implementations.\n- [OGNL](http://commons.apache.org/proper/commons-ognl/) - Object-graph navigation language.\n- [OpenPGP](http://commons.apache.org/sandbox/commons-openpgp/) - Interface to signing and verifying data using OpenPGP.\n- [Performance](http://commons.apache.org/sandbox/commons-performance/) - Small framework for microbenchmark clients, with implementations for Commons DBCP and Pool.\n- [Pipeline](http://commons.apache.org/sandbox/commons-pipeline/) - Provides a set of pipeline utilities designed around work queues that run in parallel to sequentially process data objects.\n- [Pool](http://commons.apache.org/proper/commons-pool/) - Generic object pooling component.\n- [Proxy](http://commons.apache.org/proper/commons-proxy/) - Library for creating dynamic proxies.\n- [RDF](https://commons.apache.org/proper/commons-rdf/) - Common implementation of RDF 1.1 that could be implemented by systems on the JVM.\n- [RNG](https://commons.apache.org/proper/commons-rng/) - Commons Rng provides implementations of pseudo-random numbers generators.\n- [SCXML](http://commons.apache.org/proper/commons-scxml/) - Implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.\n- [Validator](http://commons.apache.org/proper/commons-validator/) - Framework to define validators and validation rules in an xml file.\n- [VFS](http://commons.apache.org/proper/commons-vfs/) - Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.\n- [Weaver](http://commons.apache.org/proper/commons-weaver/) - Provides an easy way to enhance (weave) compiled bytecode.\n\n#### Other\n\n- [CUBA Platform](https://www.cuba-platform.com/) - High-level framework for developing enterprise applications with a rich web interface, based on Spring, EclipseLink and Vaadin.\n- [Light-4J](https://github.com/networknt/light-4j/) - Fast, lightweight and productive microservices framework with built-in [security](https://github.com/networknt/light-oauth2/).\n- [Orienteer](https://github.com/OrienteerBAP/Orienteer/) - Open-source business application platform for rapid configuration/development of CRM, ERP, LMS and other applications.\n- [Spring](https://spring.io/projects/) - Provides many packages for dependency injection, aspect-oriented programming, security, etc.\n\n### Processes\n\n_Libraries that help the management of operating system processes._\n\n- [ch.vorburger.exec](https://github.com/vorburger/ch.vorburger.exec) - Convenient API around Apache Commons Exec.\n- [zt-exec](https://github.com/zeroturnaround/zt-exec) - Provides a unified API to Apache Commons Exec and ProcessBuilder.\n- [zt-process-killer](https://github.com/zeroturnaround/zt-process-killer) - Stops processes started from Java or the system processes via PID.\n\n### Reactive libraries\n\n_Libraries for developing reactive applications._\n\n- [Akka](https://akka.io) - Toolkit and runtime for building concurrent, distributed, fault-tolerant and event-driven applications.\n- [Reactive Streams](https://github.com/reactive-streams/reactive-streams-jvm) - Provides a standard for asynchronous stream processing with non-blocking backpressure.\n- [Reactor](https://github.com/reactor/reactor) - A framework for building non-blocking applications on the JVM, providing support for reactive programming.\n- [RxJava](https://github.com/ReactiveX/RxJava) - Allows for composing asynchronous and event-based programs using observable sequences.\n- [vert.x](https://vertx.io) - Polyglot event-driven application framework.\n\n### REST Frameworks\n\n_Frameworks specifically for creating RESTful services._\n\n- [Dropwizard](https://github.com/dropwizard/dropwizard) - Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics.\n- [Elide](https://elide.io) - Opinionated framework for JSON- or GraphQL-APIs based on a JPA data model.\n- [Jersey](https://jersey.github.io) - JAX-RS reference implementation.\n- [Microserver](https://github.com/aol/micro-server) - Convenient, extensible microservices plugin system for Spring \u0026 Spring Boot. With more than 30 plugins and growing, it supports both micro-monolith and pure microservices styles.\n- [Rapidoid](https://www.rapidoid.org) - Simple, secure and extremely fast framework consisting of an embedded HTTP server, GUI components and dependency injection.\n- [rest.li](https://github.com/linkedin/rest.li) - Framework for building robust, scalable RESTful architectures using typesafe bindings and asynchronous, non-blocking IO with an end-to-end developer workflow that promotes clean practices, uniform interface design and consistent data modeling.\n- [RESTEasy](https://resteasy.github.io) - Fully certified and portable implementation of the JAX-RS specification.\n- [RestExpress](https://github.com/RestExpress/RestExpress) - Thin wrapper on the JBoss Netty HTTP stack that provides scaling and performance.\n- [Restlet Framework](https://github.com/restlet/restlet-framework-java) - Pioneering framework with powerful routing and filtering capabilities, and a unified client and server API.\n- [Spark](http://sparkjava.com) - Sinatra inspired framework.\n- [Crnk](http://www.crnk.io) - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.\n- [springdoc-openapi](https://github.com/springdoc/springdoc-openapi) - Automates the generation of API documentation using Spring Boot projects.\n- [Swagger](https://swagger.io) - Standard, language-agnostic interface to REST APIs.\n\n### Science\n\n_Libraries for scientific computing, analysis and visualization._\n\n- [BioJava](https://biojava.org/) - Facilitates processing biological data by providing algorithms, file format parsers, sequencing and 3D visualization commonly used in bioinformatics.\n- [Chart-FX](https://github.com/GSI-CS-CO/chart-fx) - Scientific charting library with focus on performance optimised real-time data visualisation at 25 Hz update rates for large data sets.\n- [DataMelt](https://datamelt.org/) - Environment for scientific computation, data analysis and data visualization. (GPL-3.0-or-later)\n- [Erdos](https://github.com/Erdos-Graph-Framework/Erdos) - Modular, light and easy graph framework for theoretic algorithms.\n- [GraphStream](http://graphstream-project.org) - Library for modeling and analyzing dynamic graphs.\n- [JFreeChart](http://www.jfree.org/jfreechart/) - 2D chart library for Swing, JavaFX and server-side applications. (LGPL-2.1-only)\n- [JGraphT](https://github.com/jgrapht/jgrapht) - Graph library that provides mathematical graph-theory objects and algorithms.\n- [JGraphX](https://github.com/jgraph/jgraphx) - Library for visualizing (mainly Swing) and interacting with node-edge graphs.\n- [LogicNG](https://github.com/logic-ng/LogicNG) - Library for creating, manipulating and solving Boolean and Pseudo-Boolean formulas.\n- [Mines Java Toolkit](https://github.com/MinesJTK/jtk) - Library for geophysical scientific computation, visualization and digital signal analysis.\n- [Morpheus](https://github.com/zavtech/morpheus-core) - Provides a versatile two-dimensional memory efficient tabular data structure called a DataFrame to enable efficient in-memory analytics for scientific computing on the JVM.\n- [Orekit](https://www.orekit.org/) - A low level space flight dynamics library providing basic elements (orbits, dates, attitude, frames...) and various algorithms (conversions, propagations, pointing...) to handle them.\n- [Orson-Charts](https://github.com/jfree/orson-charts) - Generates a wide variety of 3D charts that can be displayed with Swing and JavaFX or exported to PDF, SVG, PNG and JPEG. (GPL-3.0-only)\n- [Tablesaw](https://github.com/jtablesaw/tablesaw) - Includes a data-frame, an embedded column store, and hundreds of methods to transform, summarize, or filter data.\n- [XChart](https://github.com/knowm/XChart) - Light-weight library for plotting data. Many customizable chart types are available.\n\n### Search\n\n_Engines that index documents for search and analysis._\n\n- [Apache Lucene](https://lucene.apache.org) - High-performance, full-featured, cross-platform, text search engine library.\n- [Apache Solr](https://lucene.apache.org/solr/) - Enterprise search engine optimized for high-volume traffic.\n- [Elasticsearch](https://www.elastic.co) - Distributed, multitenant-capable, full-text search engine with a RESTful web interface and schema-free JSON documents.\n- [Indexer4j](https://github.com/haeungun/indexer4j) - Simple and light full text indexing and searching library.\n\n### Security\n\n_Libraries that handle security, authentication, authorization or session management._\n\n- [Apache Shiro](https://shiro.apache.org) - Performs authentication, authorization, cryptography and session management.\n- [Bouncy Castle](https://www.bouncycastle.org/java.html) - All-purpose cryptographic library and JCA provider offering a wide range of functions, from basic helpers to PGP/SMIME operations.\n- [DependencyCheck](https://github.com/jeremylong/DependencyCheck) - Detects publicly disclosed vulnerabilities contained within a project's dependencies.\n- [Cryptomator](https://cryptomator.org) - Multiplatform, transparent, client-side encryption of files in the cloud. (GPL-3.0-only)\n- [Hdiv](https://github.com/hdiv/hdiv) - Runtime application that repels application security risks included in the OWASP Top 10, including SQL injection, cross-site scripting, cross-site request forgery, data tampering, and brute force attacks.\n- [jjwt](https://github.com/jwtk/jjwt) - JSON web token for Java and Android.\n- [jwt-java](https://github.com/BastiaanJansen/jwt-java) - Easily create and parse JSON Web Tokens and create customized JWT validators using a fluent API.\n- [Jwks RSA](https://github.com/auth0/jwks-rsa-java) - JSON Web Key Set parser.\n- [Kalium](https://github.com/abstractj/kalium) - Binding for the Networking and Cryptography (NaCl) library.\n- [Keycloak](https://www.keycloak.org) - Integrated SSO and IDM for browser apps and RESTful web services.\n- [Keywhiz](https://github.com/square/keywhiz) - System for distributing and managing secrets.\n- [Nbvcxz](https://github.com/GoSimpleLLC/nbvcxz) - Advanced password strength estimation.\n- [OACC](http://oaccframework.org) - Provides permission-based authorization services.\n- [OpenAM](https://github.com/OpenIdentityPlatform/OpenAM) - Access management solution that includes authentication, SSO, authorization, federation, entitlements and web services security.\n- [OTP-Java](https://github.com/BastiaanJansen/OTP-Java) - One-time password generator library according to RFC 4226 (HOTP) and RFC 6238 (TOTP).\n- [pac4j](https://github.com/pac4j/pac4j) - Security engine.\n- [Passay](http://www.passay.org/) - Enforce password policy by validating candidate passwords against a configurable rule set.\n- [Password4j](https://github.com/Password4j/password4j) - User-friendly cryptographic library that supports Argon2, Bcrypt, Scrypt, PBKDF2 and various other cryptographic hash functions.\n- [SecurityBuilder](https://github.com/tersesystems/securitybuilder) - Fluent Builder API for JCA and JSSE classes and especially X.509 certificates.\n- [SSLContext-Kickstart](https://github.com/Hakky54/sslcontext-kickstart) - High-level SSL context builder for configuring HTTP clients with SSL/TLS.\n- [Themis](https://github.com/cossacklabs/themis) - Multi-platform high-level cryptographic library provides easy-to-use encryption for protecting sensitive data: secure messaging with forward secrecy, secure data storage (AES256GCM); suits for building end-to-end encrypted applications.\n- [Tink](https://github.com/google/tink) - Provides a simple and misuse-proof API for common cryptographic tasks.\n- [Topaz](https://www.topaz.sh) - Fine-grained authorization for applications with support for RBAC, ABAC, and ReBAC.\n\n### Serialization\n\n_Libraries that handle serialization with high efficiency._\n\n- [FlatBuffers](https://github.com/google/flatbuffers) - Memory-efficient serialization library that can access serialized data without unpacking and parsing it.\n- [FST](https://github.com/RuedigerMoeller/fast-serialization) - JDK-compatible, high-performance object graph serialization.\n- [Fury](https://github.com/alipay/fury) - Blazing fast object graph serialization framework powered by JIT and zero-copy.\n- [Kryo](https://github.com/EsotericSoftware/kryo) - Fast and efficient object graph serialization framework.\n- [MessagePack](https://github.com/msgpack/msgpack-java) - Efficient binary serialization format.\n- [PHP Serializer](https://github.com/marcospassos/java-php-serializer) - Serializing objects in the PHP serialization format.\n\n### Server\n\n_Servers specifically used to deploy applications._\n\n- [Apache Tomcat](https://tomcat.apache.org) - Robust, all-round server for Servlet and JSP.\n- [Apache TomEE](https://tomee.apache.org) - Tomcat plus Java EE.\n- [Jetty](https://www.eclipse.org/jetty/) - Provides a Web server and javax.servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.\n- [nanohttpd](https://github.com/NanoHttpd/nanohttpd) - Tiny, easily embeddable HTTP server.\n- [WildFly](https://www.wildfly.org) - Formerly known as JBoss and developed by Red Hat with extensive Java EE support. (LGPL-2.1-only)\n\n### Template Engine\n\n_Tools that substitute expressions in a template._\n\n- [Freemarker](https://freemarker.apache.org) - Library to generate text output (HTML web pages, e-mails, configuration files, source code, etc.) based on templates and changing data.\n- [Handlebars.java](https://jknack.github.io/handlebars.java/) - Logicless and semantic Mustache templates.\n- [Jade4J](https://github.com/neuland/jade4j) - Implementation of Pug (formerly known as Jade).\n- [Jamal](https://github.com/verhas/jamal) - Extendable template engine embedded into Maven/JavaDoc, supporting multiple extensions (Groovy, Ruby, JavaScript, JShell, PlantUml) with support for snippet handling.\n- [jstachio](https://github.com/jstachio/jstachio) - Typesafe Mustache templating engine.\n- [jte](https://github.com/casid/jte) - Compiles to classes, and uses an easy syntax, several features to make development easier and provides fast execution and a small footprint.\n- [Jtwig](https://github.com/jtwig/jtwig) - Modular, configurable and fully tested template engine.\n- [Pebble](https://pebbletemplates.io) - Inspired by Twig and separates itself with its inheritance feature and its easy-to-read syntax. It ships with built-in autoescaping for security and it includes integrated support for internationalization.\n- [Rocker](https://github.com/fizzed/rocker) - Optimized, memory efficient and speedy template engine producing statically typed, plain objects.\n- [StringTemplate](https://github.com/antlr/stringtemplate4) - Template engine for generating source code, web pages, emails, or any other formatted text output.\n- [Thymeleaf](https://www.thymeleaf.org) - Aims to be a substitute for JSP and works for XML files.\n\n### Testing\n\n_Tools that test from model to the view._\n\n#### Asynchronous\n\n_Tools that simplify testing asynchronous services._\n\n- [Awaitility](https://github.com/awaitility/awaitility) - DSL for synchronizing asynchronous operations.\n- [ConcurrentUnit](https://github.com/jhalterman/concurrentunit) - Toolkit for testing multi-threaded and asynchronous applications.\n- [GreenMail](https://greenmail-mail-test.github.io/greenmail/) - In-memory email server for integration testing. Supports SMTP, POP3 and IMAP including SSL. (GPL-2.0-only)\n- [Hoverfly Java](https://github.com/SpectoLabs/hoverfly-java) - Native bindings for Hoverfly, a proxy which allows you to simulate HTTP services.\n- [Karate](https://github.com/intuit/karate) - DSL that combines API test-automation, mocks and performance-testing making testing REST/HTTP services easy.\n- [REST Assured](https://github.com/rest-assured/rest-assured) - DSL for easy testing of REST/HTTP services.\n- [WebTau](https://github.com/testingisdocumenting/webtau) - Test across REST-API, Graph QL, Browser, Database, CLI and Business Logic with consistent set of matchers and concepts.\n\n#### BDD\n\n_Testing for the software development process that emerged from TDD and was heavily influenced by DDD and OOAD._\n\n- [Cucumber](https://github.com/cucumber/cucumber-jvm) - Provides a way to describe features in a plain language which customers can understand.\n- [Cukes-REST](https://github.com/ctco/cukes) - Collection of Gherkin steps for REST-service testing using Cucumber.\n- [J8Spec](https://github.com/j8spec/j8spec) - Follows a Jasmine-like syntax.\n- [JBehave](https://jbehave.org) - Extensively configurable framework that describes stories.\n- [JGiven](http://jgiven.org) - Provides a fluent API which allows for simpler composition.\n- [Lamdba Behave](https://github.com/RichardWarburton/lambda-behave) - Aims to provide a fluent API to write tests in long and descriptive sentences that read like plain English.\n- [Serenity BDD](https://github.com/serenity-bdd/serenity-core) - Automated Acceptance testing and reporting library that works with Cucumber, JBehave and JUnit to make it easier to write high quality executable specifications.\n\n#### Fixtures\n\n_Everything related to the creation and handling of random data._\n\n- [AutoParams](https://github.com/AutoParams/AutoParams) - Supports generating test data or combining scenarios for parameterized tests.\n- [Beanmother](https://github.com/keepcosmos/beanmother) - Sets up beans from YAML fixtures.\n- [Datafaker](https://github.com/datafaker-net/datafaker) - Modern fake data generator forked from Java Faker.\n- [Fixture Factory](https://github.com/six2six/fixture-factory) - Generates fake objects from a template.\n- [jFairy](https://github.com/Devskiller/jfairy) - Fake data generator.\n- [Instancio](https://github.com/instancio/instancio) - Automates data setup in unit tests by generating fully-populated, reproducible objects. Includes JUnit 5 extension.\n- [Randomized Testing](https://github.com/randomizedtesting/randomizedtesting) - JUnit test runner and plugins for running JUnit tests with pseudo-randomness.\n- [Java Faker](https://github.com/DiUS/java-faker) - Port of Ruby's fake data generator.\n- [Mockneat](https://github.com/nomemory/mockneat) - Another fake data generator.\n- [JMock](https://github.com/xcancloud/JMock) - JMock is a high-performance data generation and simulation component library implemented in Java.\n\n#### Frameworks\n\n_Provide environments to run tests for a specific use case._\n\n- [Apache JMeter](http://jmeter.apache.org) - Functional testing and performance measurements.\n- [JMeter DSL.java](https://abstracta.github.io/jmeter-java-dsl/) - Load tests with JMeter as simple as a JUnit test.\n- [Arquillian](http://arquillian.org) - Integration and functional testing platform for Java EE containers.\n- [cdi-test](https://github.com/guhilling/cdi-test) - JUnit extension for easy and efficient testing of CDI components.\n- [Citrus](https://citrusframework.org) - Integration testing framework that focuses on both client- and server-side messaging.\n- [Gatling](https://gatling.io) - Load testing tool designed for ease of use, maintainability and high performance.\n- [JUnit](https://junit.org/junit5/) - Common testing framework.\n- [jqwik](https://jqwik.net) - Engine for property-based testing built on JUnit 5.\n- [Pact JVM](https://github.com/DiUS/pact-jvm) - Consumer-driven contract testing.\n- [PIT](http://pitest.org) - Fast mutation-testing framework for evaluating fault-detection abilities of existing JUnit or TestNG test suites.\n- [weld-testing](https://github.com/weld/weld-testing) - Set of test framework extensions (JUnit 4, JUnit 5, Spock) to enhance the testing of CDI components via Weld. Supports Weld 5.\n\n#### Matchers\n\n_Libraries that provide custom matchers._\n\n- [AssertJ](https://joel-costigliola.github.io/assertj/) - Fluent assertions that improve readability.\n- [Hamcrest](http://hamcrest.org/JavaHamcrest/) - Matchers that can be combined to create flexible expressions of intent.\n- [JSONAssert](http://jsonassert.skyscreamer.org) - Simplifies testing JSON strings.\n- [JsonUnit](https://github.com/lukas-krecan/JsonUnit) - Library that simplifies JSON comparison in tests.\n- [Truth](https://truth.dev) - Google's fluent assertion and proposition framework.\n- [XMLUnit](https://github.com/xmlunit/xmlunit) - Simplifies testing for XML output.\n\n#### Miscellaneous\n\n_Other stuff related to testing._\n\n- [ConsoleCaptor](https://github.com/Hakky54/console-captor) - Captures console output for unit testing purposes.\n- [junit-dataprovider](https://github.com/TNG/junit-dataprovider) - TestNG-like data provider/runner for JUnit.\n- [LogCaptor](https://github.com/Hakky54/log-captor) - Captures log entries for unit testing purposes.\n- [log-capture](https://github.com/dm-drogeriemarkt/log-capture) - Captures log entries and provides assertions for unit and integration testing.\n- [Mutability Detector](https://github.com/MutabilityDetector/MutabilityDetector) - Reports whether instances of a given class are immutable.\n- [pojo-tester](https://www.pojo.pl) - Automatically performs tests on basic POJO methods. (LGPL-3.0-only)\n- [raml-tester](https://github.com/nidi3/raml-tester) - Tests if a request/response matches a given RAML definition.\n- [Selfie](https://github.com/diffplug/selfie) - Snapshot testing (inline and on disk).\n- [Stebz](https://github.com/stebz/stebz) - Multi-approach framework for test steps managing.\n- [Testcontainers](https://github.com/testcontainers/testcontainers-java) - Provides throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.\n\n#### Mocking\n\n_Tools which mock collaborators to help testing single, isolated units._\n\n- [JMockit](http://jmockit.github.io) - Integration testing, API mocking and faking, and code coverage.\n- [Mockito](https://github.com/mockito/mockito) - Mocking framework that lets you write tests with a clean and simple API.\n- [MockServer](https://www.mock-server.com) - Allows mocking of systems integrated with HTTPS.\n- [Moco](https://github.com/dreamhead/moco) - Concise web services for stubs and mocks.\n- [PowerMock](https://github.com/powermock/powermock) - Mocks static methods, constructors, final classes and methods, private methods, and removal of static initializers.\n- [WireMock](http://wiremock.org) - Stubs and mocks web services.\n- [EasyMock](https://github.com/easymock/easymock) - EasyMock is a Java library that provides an easy way to use Mock Objects in unit testing.\n\n### Utility\n\n_Libraries which provide general utility functions._\n\n- [Arthas](https://github.com/alibaba/arthas) - Allows to troubleshoot production issues for applications without modifying code or restarting servers.\n- [bucket4j](https://github.com/vladimir-bukhtoyarov/bucket4j) - Rate limiting library based on token-bucket algorithm.\n- [cactoos](https://github.com/yegor256/cactoos) - Collection of object-oriented primitives.\n- [Chocotea](https://github.com/cleopatra27/chocotea) - Generates postman collection, environment and integration tests from java code.\n- [CRaSH](http://www.crashub.org) - Provides a shell into a JVM that's running CRaSH. Used by Spring Boot and others. (LGPL-2.1-or-later)\n- [Dex](https://github.com/PatMartin/Dex) - Java/JavaFX tool capable of powerful ETL and data visualization.\n- [dregex](https://github.com/marianobarrios/dregex) - Regular expression engine that uses deterministic finite automata. It supports some Perl-style features and yet retains linear matching time, and also offers set operations.\n- [Embulk](https://github.com/embulk/embulk) - Bulk data loader that helps data transfer between various databases, storages, file formats, and cloud services.\n- [fswatch](https://github.com/vorburger/ch.vorburger.fswatch) - Micro library to watch for directory file system changes, simplifying java.nio.file.WatchService.\n- [Gephi](https://github.com/gephi/gephi) - Cross-platform for visualizing and manipulating large graph networks. (GPL-3.0-only)\n- [Guava](https://github.com/google/guava) - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and more.\n- [JADE](https://jade.tilab.com) - Framework and environment for building and debugging multi-agent systems. (LGPL-2.0-only)\n- [Javadoc Publisher](https://github.com/MathieuSoysal/Javadoc-publisher.yml) - Generate Javadoc from your maven/gradle project and deploy it automatically on GitHub Page.\n- [Java Diff Utils](https://java-diff-utils.github.io/java-diff-utils/) - Utilities for text or data comparison and patching.\n- [JavaVerbalExpressions](https://github.com/VerbalExpressions/JavaVerbalExpressions) - Library that helps with constructing difficult regular expressions.\n- [JGit](https://www.eclipse.org/jgit/) - Lightweight, pure Java library implementing the Git version control system.\n- [JKScope](https://github.com/evpl/jkscope) - Java scope functions inspired by Kotlin.\n- [minio-java](https://github.com/minio/minio-java) - Provides simple APIs to access any Amazon S3-compatible object storage server.\n- [Protégé](https://protege.stanford.edu) - Provides an ontology editor and a framework to build knowledge-based systems.\n- [Semver4j](https://github.com/semver4j/semver4j) - Lightweight library that helps you handling semantic versioning with different modes.\n- [Underscore-java](https://github.com/javadev/underscore-java) - Port of Underscore.js functions.\n\n### Version Managers\n\n_Utilities that help create the development shell environment and switch between different Java versions._\n\n- [jabba](https://github.com/shyiko/jabba) - Java Version Manager inspired by nvm. Supports macOS, Linux and Windows.\n- [jenv](https://github.com/jenv/jenv) - Java Version Manager inspired by rbenv. Can configure globally or per project. Tested on Debian and macOS.\n- [SDKMan](https://github.com/sdkman/sdkman-cli) - Java Version Manager inspired by RVM and rbenv. Supports UNIX-based platforms and Windows.\n\n### Web Crawling\n\n_Libraries that analyze the content of websites._\n\n- [Apache Nutch](https://nutch.apache.org) - Highly extensible, highly scalable web crawler for production environments.\n- [Crawler4j](https://github.com/yasserg/crawler4j) - Simple and lightweight web crawler.\n- [jsoup](https://jsoup.org) - Scrapes, parses, manipulates and cleans HTML.\n- [StormCrawler](http://stormcrawler.net) - SDK for building low-latency and scalable web crawlers.\n- [webmagic](https://github.com/code4craft/webmagic) - Scalable crawler with downloading, url management, content extraction and persistent.\n\n### Web Frameworks\n\n_Frameworks that handle the communication between the layers of a web application._\n\n- [ActiveJ](https://activej.io) - Lightweight asynchronous framework built from the ground up for developing high-performance web applications.\n- [Apache Tapestry](https://tapestry.apache.org) - Component-oriented framework for creating dynamic, robust, highly scalable web applications.\n- [Apache Wicket](https://wicket.apache.org) - Component-based web application framework similar to Tapestry, with a stateful GUI.\n- [Blade](https://github.com/lets-blade/blade) - Lightweight, modular framework that aims to be elegant and simple.\n- [Bootique](https://bootique.io) - Minimally opinionated framework for runnable apps.\n- [Firefly](http://www.fireflysource.com) - Asynchronous framework for rapid development of high-performance web application.\n- [Javalin](https://javalin.io/) - Microframework for web applications.\n- [Jooby](http://www.jooby.org) - Scalable, fast and modular micro-framework that offers multiple programming models.\n- [Ninja](http://www.ninjaframework.org) - Full-stack web framework.\n- [Pippo](http://www.pippo.ro) - Small, highly modularized, Sinatra-like framework.\n- [Play](https://www.playframework.com) - Built on Akka, it provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications in Java and Scala.\n- [PrimeFaces](https://www.primefaces.org) - JSF framework with both free and commercial/support versions and frontend components.\n- [Ratpack](https://ratpack.io) - Set of libraries that facilitate fast, efficient, evolvable and well-tested HTTP applications.\n- [Takes](https://github.com/yegor256/takes) - Opinionated web framework which is built around the concepts of True Object-Oriented Programming and immutability.\n- [Vaadin](https://vaadin.com) - Full-stack open-source Java framework that simplifies web app development. Build complex, interactive applications with Java alone, and enhance with TypeScript and React components, without needing deep JavaScript, CSS, or HTML expertise.\n\n### Workflow Orchestration Engines\n\n- [Cadence](https://cadenceworkflow.io) - Stateful code platform from Uber.\n- [flowable](https://github.com/flowable/flowable-engine) - Compact and efficient workflow and business process management platform.\n- [Temporal](https://temporal.io) - Microservice orchestration platform, forked from Cadence but gRPC based.\n\n## Resources\n\n### Related Awesome Lists\n\n_Awesome Lists related to the Java \u0026 JVM ecosystem._\n\n- [Awesome Annotation Processing](https://github.com/gunnarmorling/awesome-annotation-processing)\n- [Awesome Graal](https://github.com/neomatrix369/awesome-graal)\n- [Awesome Gradle Plugins](https://github.com/ksoichiro/awesome-gradle)\n- [Awesome Java libraries and hidden gems](https://libs.tech/java)\n- [Awesome J2ME](https://github.com/hstsethi/awesome-j2me)\n- [AwesomeJavaFX](https://github.com/mhrimaz/AwesomeJavaFX)\n- [Awesome JVM](https://github.com/deephacks/awesome-jvm)\n- [Awesome Microservices](https://github.com/mfornos/awesome-microservices)\n- [Awesome REST](https://github.com/marmelab/awesome-rest)\n- [Awesome Selenium](https://github.com/christian-bromann/awesome-selenium)\n- [Awesome Hybris](https://github.com/eminyagiz42/awesome-hybris)\n- [ciandcd](https://github.com/ciandcd/awesome-ciandcd)\n- [Useful Java Links](https://github.com/Vedenin/useful-java-links)\n- [Java Concurrency Checklist](https://github.com/code-review-checklists/java-concurrency)\n- [Java Developer Roadmap](https://github.com/s4kibs4mi/java-developer-roadmap)\n\n### Communities\n\n_Active discussions._\n\n- [r/java](https://www.reddit.com/r/java/) - Subreddit for the Java community.\n- [Stack Overflow](https://stackoverflow.com/questions/tagged/java) - Question/answer platform.\n\n### Frontends\n\n_Websites that provide a frontend for this list. Please note, there won't be an official website. We don't associate with a particular website and everybody is allowed to create one._\n\n- [java.libhunt.com](https://java.libhunt.com)\n\n### Influential Books\n\n_Books that made a big impact and are still worth reading._\n\n- [Core Java Volume I--Fundamentals](https://www.amazon.com/Core-Java-I-Fundamentals-10th/dp/0134177304)\n- [Core Java, Volume II--Advanced Features](https://www.amazon.com/Core-Java-II-Advanced-Features-10th/dp/0134177290)\n- [Effective Java (3rd Edition)](https://www.amazon.com/Effective-Java-3rd-Joshua-Bloch/dp/0134685997)\n- [Head First Java (3rd Edition)](https://www.oreilly.com/library/view/head-first-java/9781492091646/)\n- [Java Concurrency in Practice](https://www.amazon.com/Java-Concurrency-Practice-Brian-Goetz/dp/0321349601)\n- [The Well-Grounded Java Developer (2nd Edition)](https://www.manning.com/books/the-well-grounded-java-developer-second-edition)\n- [Thinking in Java](https://www.amazon.com/Thinking-Java-Edition-Bruce-Eckel/dp/0131872486)\n\n### Podcasts and Screencasts\n\n_Something to look at or listen to while programming._\n\n- [140 Second Ducklings](https://twitter.com/debugagent/status/1491075324805001219) - Short videos on Twitter explaining Java debugging in depth.\n- [A Bootiful Podcast](https://bootifulpodcast.fm)\n- [Foojay Podcast](https://foojay.io/today/category/podcast/)\n- [Inside Java](https://inside.java/podcast) (Official)\n- [Java Off Heap](http://www.javaoffheap.com)\n- [The Java Posse](http://www.javaposse.com) - Discontinued as of 02/2015.\n\n### People\n\n#### Socials\n\n_Active accounts to follow. Descriptions from their socials._\n\n- [Adam Bien](https://twitter.com/AdamBien) - Freelance author, JavaOne Rockstar speaker, consultant, Java Champion.\n- [Aleksey Shipilëv](https://twitter.com/shipilev) - Performance geek, benchmarking czar, concurrency bug hunter.\n- [Antonio Goncalves](https://twitter.com/agoncal) - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author.\n- [Arun Gupta](https://twitter.com/arungupta) - Java Champion, JavaOne Rockstar, JUG Leader, Devoxx4Kids-er, VP of Developer Advocacy at Couchbase.\n- [Brian Goetz](https://bsky.app/profile/briangoetz.bsky.social) - Java Language Architect at Oracle.\n- [Bruno Borges](https://twitter.com/brunoborges) - Product Manager/Java Jock at Oracle.\n- [Chris Engelbert](https://twitter.com/noctarius2k) - Open Source Enthusiast, Speaker, Developer, Developer Advocacy at TimescaleDB.\n- [Chris Richardson](https://bsky.app/profile/crichardson.bsky.social) - Software architect, consultant, and serial entrepreneur, Java Champion, JavaOne Rock Star, \\*POJOs in Action- author.\n- [Ed Burns](https://twitter.com/edburns) - Consulting Member of the Technical Staff at Oracle.\n- [Eugen Paraschiv](https://twitter.com/baeldung) - Author of the Spring Security Course.\n- [Heinz Kabutz](https://twitter.com/heinzkabutz) - Java Champion, speaker, author of The Java Specialists' Newsletter, concurrency performance expert.\n- [Holly Cummins](https://twitter.com/holly_cummins) - Technical Lead of IBM London's Bluemix Garage, Java Champion, developer, author, JavaOne rockstar.\n- [James Weaver](https://twitter.com/JavaFXpert) - Java/JavaFX/IoT developer, author and speaker.\n- [Java](https://twitter.com/java) - Official Java Twitter account.\n- [Javin Paul](https://twitter.com/javinpaul) - Well-known Java blogger.\n- [Josh Long](https://twitter.com/starbuxman) - Spring Advocate at Pivotal, author of O'Reilly's Cloud Native Java- and Building Microservices with Spring Boot, JavaOne Rock Star.\n- [Lukas Eder](https://bsky.app/profile/lukaseder.bsky.social) - Java Champion, speaker, Founder and CEO Data Geekery (jOOQ).\n- [Mani Sarkar](https://twitter.com/theNeomatrix369) - Java champion, Polyglot, Software Crafter involved with @graalvm, AI/ML/DL, Data Science, Developer communities, speaker \u0026 blogger. Creator of couple of awesome lists like this one.\n- [Mario Fusco](https://twitter.com/mariofusco) - RedHatter, JUG coordinator, frequent speaker and author.\n- [Mark Heckler](https://twitter.com/MkHeck) - Pivotal Principal Technologist and Developer Advocate, conference speaker, published author, and Java Champion, focusing on Internet of Things and the cloud.\n- [Markus Eisele](https://twitter.com/myfear) - Java EE evangelist, Red Hat.\n- [Martijn Verburg](https://twitter.com/karianna) - London JUG co-leader, speaker, author, Java Champion and much more.\n- [Martin Thompson](https://twitter.com/mjpt777) - Pasty faced performance gangster.\n- [Monica Beckwith](https://twitter.com/mon_beck) - Performance consultant, JavaOne Rock Star.\n- [OpenJDK](https://twitter.com/OpenJDK) - Official OpenJDK account.\n- [Peter Lawrey](https://twitter.com/PeterLawrey) - Peter Lawrey, Java performance expert.\n- [Randy Shoup](https://twitter.com/randyshoup) - Stitch Fix VP Engineering, speaker, JavaOne Rock Star.\n- [Reza Rahman](https://twitter.com/reza_rahman) - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker.\n- [Sander Mak](https://twitter.com/Sander_Mak) - Java Champion, author.\n- [Simon Maple](https://twitter.com/sjmaple) - Java Champion, VirtualJUG founder, LJC leader, RebelLabs author.\n- [Spencer Gibb](https://twitter.com/spencerbgibb) - Software Engineer, Dad, Geek, Co-founder and Lead of Spring Cloud Core @pivotal.\n- [Stephen Colebourne](https://bsky.app/profile/jodastephen.bsky.social) - Java Champion, speaker.\n- [Trisha Gee](https://twitter.com/trisha_gee) - Java Champion and speaker.\n- [Venkat Subramaniam](https://twitter.com/venkat_s) - Author, University of Houston professor, MicroSoft MVP award recipient, JavaOne Rock Star, Java Champion.\n- [Vlad Mihalcea](https://twitter.com/vlad_mihalcea) - Java Champion working on Hypersistence Optimizer, database aficionado, author of High-Performance Java Persistence book.\n\n### Websites\n\n_Sites to read._\n\n- [Baeldung](https://www.baeldung.com)\n- [Dzone](https://dzone.com)\n- [foojay.io](https://foojay.io)\n- [Google Java Style](https://google.github.io/styleguide/javaguide.html)\n- [InfoQ](https://www.infoq.com)\n- [Java Algorithms and Clients](https://algs4.cs.princeton.edu/code)\n- [Java, SQL, and jOOQ](https://blog.jooq.org)\n- [Java.net](https://community.oracle.com/community/java)\n- [Javalobby](https://dzone.com/java-jdk-development-tutorials-tools-news)\n- [JavaWorld](https://www.javaworld.com)\n- [JAXenter](https://jaxenter.com)\n- [RebelLabs](https://zeroturnaround.com/rebellabs)\n- [OverOps Blog](https://blog.overops.com)\n- [TheServerSide.com](http://www.theserverside.com)\n- [Vanilla Java](https://vanilla-java.github.io)\n- [Voxxed](https://www.voxxed.com)\n- [Java Weekly](https://discu.eu/weekly/java/)\n\n## Contributing\n\nContributions are very welcome!\n\nPlease have a look at the [CONTRIBUTING](https://github.com/akullpp/awesome-java/blob/master/CONTRIBUTING.md) guidelines and [the validation tools](https://github.com/akullpp/awesome-java-lint).\n\n[c]: https://cdn.rawgit.com/akullpp/23246ca832bda82bb505230bf3538e2a/raw/d9bcdb769bf025292f9c6bc1290f01f1fcd1f864/commercial.svg\n","funding_links":[],"categories":["Others","Programming Languages","Technical","▶️ Content","Programming languages","Other Awesome Resources","[Programming]","Others (1002)","Contribute","Uncategorized","Progamnyelvek","miscellaneous","Misc","Navigation","Index","Other awesome sites","编程语言","Java","Awesomeness","Related awesome lists","HarmonyOS","Programming languages and frameworks","General","Java 程序设计","Back-End","github hot awesome","awesome lists","front-end-development","Live Site:   [searchAwesome](https://search-awesome.vercel.app/)","Source","Repositories 📦","awesome-repos","Awesome Tools","Don't forget to give a :star: to make the project popular","SW-Bibliotheken \u0026 -Frameworks","Other Lists","Development:","Back-end","Libraries","Language Specific Resources","Awesome lists :heart:","\u003ca name=\"Not%20Set\"\u003e\u003c/a\u003eNot Set","Java 基础","语言","Awesome 系列"],"sub_categories":["awesome-*","Programming Languages","Awesome Lists","[Programming] - [Java]","Uncategorized","Java","Repos","运维\\\u0026DevOps","Windows Manager","Others","网络服务_其他","Websites","Languages","TeX Lists","Category Theory","教程","General Learning Material"],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fakullpp%2Fawesome-java","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fakullpp%2Fawesome-java","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fakullpp%2Fawesome-java/lists"}