Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
awesome-java
https://github.com/anhnt-ptit/awesome-java
- Dozer - Mapper that copies data from one object to another using annotations and API or XML configuration.
- JMapper - Uses byte code manipulation for lightning-fast mapping. Supports annotations and API or XML configuration.
- MapStruct - Code generator that simplifies mappings between different bean types, based on a convention-over-configuration approach.
- ModelMapper - Intelligent object mapping library that automatically maps objects to each other.
- Orika - JavaBean-mapping framework that recursively copies (among other capabilities) data from one object to another.
- Selma - Annotation processor-based bean mapper.
- Apache Maven - 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.
- Bazel - Tool from Google that builds code quickly and reliably.
- Buck - Encourages the creation of small, reusable modules consisting of code and resources.
- Gradle - Incremental builds programmed via Groovy instead of declaring XML. Works well with Maven's dependency management.
- ASM - All-purpose, low-level bytecode manipulation and analysis.
- Byte Buddy - Further simplifies bytecode generation with a fluent API.
- bytecode-viewer - Java 8 Jar & Android APK reverse engineering suite.
- Byteman - Manipulate bytecode at runtime via DSL (rules); mainly for testing/troubleshooting.
- cglib - Bytecode generation library.
- Javassist - Tries to simplify bytecode editing.
- Caffeine - High-performance, near-optimal caching library.
- Ehcache - Distributed general-purpose cache.
- Infinispan - Highly concurrent key/value datastore used for caching.
- Apache Aurora - Mesos framework for long-running services and cron jobs.
- Apache Mesos - Abstracts CPU, memory, storage, and other compute resources away from machines.
- Singularity - Mesos framework that makes deployment and operations easy. It supports web services, background workers, scheduled jobs, and one-off tasks.
- Checkstyle - Static analysis of coding conventions and standards.
- Error Prone - Catches common programming mistakes as compile-time errors.
- Infer - Modern static analysis tool for verifying the correctness of code.
- jQAssistant - Static code analysis with Neo4J-based query language.
- NullAway - Eliminates NullPointerExceptions with low build-time overhead.
- PMD - Source code analysis for finding bad coding practices.
- SonarJava - Static analyzer for SonarQube & SonarLint.
- Sourcetrail ![c - Visual source code navigator.
- Spoon - Library for analyzing and transforming Java source code.
- Spotbugs - Static analysis of bytecode to find potential bugs.
- Clover ![c - Relies on source-code instrumentation instead of bytecode instrumentation.
- Cobertura - Relies on offline (or static) bytecode instrumentation and class loading to collect code coverage metrics.
- JaCoCo - Framework that enables collection of code coverage metrics, using both offline and runtime bytecode instrumentation.
- ADT4J - JSR-269 code generator for algebraic data types.
- Auto - Generates factory, service, and value classes.
- FreeBuilder - Automatically generates the Builder pattern.
- Immutables - Annotation processors to generate simple, safe and consistent value objects.
- JavaPoet - API to generate source files.
- JHipster - Yeoman source code generator for Spring Boot and AngularJS.
- Joda-Beans - Small framework that adds queryable properties to Java, enhancing JavaBeans.
- Lombok - Code generator that aims to reduce verbosity.
- Airline - Annotation-based framework for parsing Git-like command-line arguments.
- args4j - Small library to parse command-line arguments.
- JCommander - Command-line argument-parsing framework with custom types and validation via implementing interfaces.
- JOpt Simple - Simple parser that uses the POSIX getopt() and GNU getopt_long() syntaxes. Uses a fluent API instead of annotations.
- picocli - ANSI colors and styles in usage help. Can be included as source to avoid dependency. Annotation-based, POSIX/GNU/any syntax, subcommands, strong typing for both options and positional args.
- ANTLR - Complex full-featured framework for top-down parsing.
- JavaCC - Parser generator that generates top-down parsers. Allows lexical state switching and permits extended BNF specifications.
- JFlex - A lexical analyzer generator.
- centraldogma - Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2.
- cfg4j - Modern configuration library for distributed apps written in Java.
- config - Configuration library for JVM languages.
- dotenv - A twelve-factor configuration library for Java.
- ini4j - Provides an API for handling Windows' INI files.
- KAConf - Annotation-based configuration system for Java and Kotlin.
- owner - Reduces boilerplate of properties.
- Choco - Off-the-shelf constraint satisfaction problem solver that uses constraint programming techniques.
- JaCoP - Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models.
- OptaPlanner - Business planning and resource scheduling optimization solver.
- jackson-dataformat-csv - Jackson extension for reading and writing CSV.
- opencsv - Simple CSV parser.
- Super CSV - Powerful CSV parser with support for Dozer, Joda-Time and Java 8.
- uniVocity-parsers - One of the fastest and most feature-complete parsers. Also comes with parsers for TSV and fixed-width records.
- Apache Phoenix - High-performance relational database layer over HBase for low-latency applications.
- Chronicle Map - Efficient, in-memory (opt. persisted to disk), off-heap key-value store.
- druid - High-performance, column-oriented, distributed data store.
- eXist - A NoSQL document database and application platform.
- FlexyPool - Brings metrics and failover strategies to the most common connection pooling solutions.
- Flyway - Simple database migration tool.
- H2 - Small SQL database notable for its in-memory functionality.
- HikariCP - High-performance JDBC connection pool.
- JDBI - Convenient abstraction of JDBC.
- Jedis - Small client for interaction with Redis, with methods for commands.
- Jest - Client for the Elasticsearch REST API.
- jetcd - Client library for etcd.
- Jinq - Typesafe database queries via symbolic execution of Java 8 Lambdas (on top of JPA or jOOQ).
- jOOQ - Generates typesafe code based on SQL schema.
- Liquibase - Database-independent library for tracking, managing and applying database schema changes.
- MapDB - Embedded database engine that provides concurrent collections backed on disk or in off-heap memory.
- MariaDB4j - Launcher for MariaDB that requires no installation or external dependencies.
- OrientDB - Embeddable distributed database written on top of Hazelcast.
- Presto - Distributed SQL query engine for big data.
- Querydsl - Typesafe unified queries.
- Realm - Mobile database to run directly inside phones, tablets or wearables.
- Redisson - Allows for distributed and scalable data structures on top of a Redis server.
- requery - A 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.
- Speedment - Database access library that utilizes Java 8's Stream API for querying.
- sql2o - Thin JDBC wrapper that simplifies database access and provides simple mapping of ResultSets to POJOs.
- Vibur DBCP - JDBC connection pool library with advanced performance monitoring capabilities.
- Xodus - Highly concurrent transactional schema-less and ACID-compliant embedded database.
- Apache Avro - Data interchange format with dynamic typing, untagged data, and absence of manually assigned IDs.
- Apache Orc - Fast and efficient columnar storage format for Hadoop-based workloads.
- Apache Parquet - Columnar storage format based on assembly algorithms from Google's paper on Dremel.
- Apache Thrift - Data interchange format that originated at Facebook.
- Big Queue - A big, fast and persistent queue based on memory-mapped files.
- Persistent Collection - Persistent and immutable analogue of the Java Collections Framework.
- Protobuf - Google's data interchange format.
- SBE - Simple Binary Encoding, one of the fastest message formats around.
- Tape - A lightning-fast, transactional, file-based FIFO.
- Wire - Clean, lightweight protocol buffers.
- Almanac Converter - Simple conversion between different calendar systems.
- iCal4j - Parse and build iCalendar [RFC 5545](https://tools.ietf.org/html/rfc5545) data models.
- ThreeTen-Extra - Additional date-time classes that complement those in JDK 8.
- Time4J - Advanced date and time library.
- Inversion of Control
- Apache DeltaSpike - CDI extension framework.
- Dagger2 - Compile-time injection framework without reflection.
- Feather - Ultra-lightweight, JSR-330-compliant dependency injection library.
- Governator - Extensions and utilities that enhance Google Guice.
- Guice - Lightweight and opinionated framework that completes Dagger.
- HK2 - Lightweight and dynamic dependency injection framework.
- AspectJ - Seamless aspect-oriented programming extension.
- DCEVM - JVM modification that allows unlimited redefinition of loaded classes at runtime.
- 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.
- HotswapAgent - Unlimited runtime class and resource redefinition.
- JavaParser - Parse, modify and generate Java code.
- JavaSymbolSolver - A symbol solver for Java.
- JRebel ![c - Instantly reloads code and configuration changes without redeploys.
- NoException - Allows checked exceptions in functional interfaces and converts exceptions to Optional return.
- Apache Geode - In-memory data management system that provides reliable asynchronous event notifications and guaranteed message delivery.
- Apache Storm - Realtime computation system.
- Apache ZooKeeper - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems.
- Atomix - Fault-tolerant distributed coordination framework.
- Axon Framework - Framework for creating CQRS applications.
- Dropwizard Circuit Breaker - Circuit breaker design pattern for Dropwizard.
- Failsafe - Simple failure handling with retries and circuit breakers.
- Hazelcast ![c - Highly scalable in-memory datagrid with a free open-source version.
- Hystrix - Provides latency and fault tolerance.
- JGroups - Toolkit for reliable messaging and cluster creation.
- Orbit - Virtual actors; adds another level of abstraction to traditional actors.
- Quasar - Lightweight threads and actors for the JVM.
- resilience4j - Functional fault tolerance library.
- ScaleCube - Embeddable Cluster-Membership library based on SWIM and gossip protocol.
- Zuul - A gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
- Atomikos - Provides transactions for REST, SOA and microservices with support for JTA and XA.
- Bitronix - A simple but complete implementation of the JTA 1.1 API.
- Narayana - Provides support for traditional ACID and compensation transactions, also complies with JTA, JTS and other standards.
- Bintray ![c - Version control for binaries that handle publishing. Compatible with Maven or Gradle, with a free plan for open-source software as well as several business plans.
- Boxfuse - Deployment of JVM applications to AWS using the principles of immutable infrastructure.
- Capsule - Simple and powerful packaging and deployment. A fat JAR on steroids, or a "Docker for Java" that supports JVM-optimized containers.
- Central Repository - 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.
- IzPack - Setup authoring tool for cross-platform deployments.
- JitPack - Easy-to-use package repository for GitHub. Builds Maven/Gradle projects on demand and publishes ready-to-use packages.
- Nexus ![c - Binary management with proxy and caching capabilities.
- packr - Packs JARs, assets and the JVM for native distribution on Windows, Linux and Mac OS X.
- really-executable-jars-maven-plugin - Maven plugin for making self-executing JARs.
- Apache POI - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT).
- documents4j - API for document format conversion using third-party converters such as MS Word.
- docx4j - Create and manipulate Microsoft Open XML files.
- CATG - Concolic unit testing engine. Automatically generates unit tests using formal methods.
- Checker Framework - Pluggable type systems. Includes nullness types, physical units, immutability types and more.
- Daikon - Detects likely program invariants and generates JML specs based on those invariants.
- Java Path Finder (JPF) - JVM formal verification tool containing a model checker and more. Created by NASA.
- JMLOK 2.0 - Detects inconsistencies between code and JML specification through feedback-directed random tests generation, and suggests a likely cause for each nonconformance detected.
- KeY - 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.
- OpenJML - Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers.
- cyclops-react - Monad and stream utilities, comprehensions, pattern matching, functional extensions for all JDK collections, future streams, trampolines and much more.
- derive4j - Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching and morphisms.
- Fugue - Functional extensions to Guava.
- Functional Java - Implements numerous basic and advanced programming abstractions that assist composition-oriented development.
- jOOλ - 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.
- protonpack - Collection of stream utilities.
- StreamEx - Enhances Java 8 Streams.
- Vavr - Functional component library that provides persistent data types and functional control structures.
- FXGL - JavaFX Game Development Framework.
- jMonkeyEngine - Game engine for modern 3D development.
- libGDX - All-round cross-platform, high-level framework.
- LWJGL - Robust framework that abstracts libraries like OpenGL/CL/AL.
- Apache SIS - Library for developing geospatial applications.
- Geo - GeoHash utilities in Java.
- Geotoolkit.org - Library for developing geospatial applications. Built on top of the Apache SIS project.
- GeoTools - Library that provides tools for geospatial data.
- GraphHopper - Road-routing engine. Used as a Java library or standalone web service.
- H2GIS - A spatial extension of the H2 database.
- Jgeohash - Library for using the GeoHash algorithm.
- Mapsforge - Map rendering based on OpenStreetMap data.
- Spatial4j - General-purpose spatial/geospatial library.
- JavaFX - The successor of Swing.
- Scene Builder - Visual layout tool for JavaFX applications.
- SWT - The Standard Widget Toolkit, a graphical widget toolkit.
- Agrona - Data structures and utility methods that are common in high-performance applications.
- Disruptor - Inter-thread messaging library.
- Eclipse Collections - Collections framework inspired by Smalltalk.
- fastutil - Fast and compact type-specific collections.
- HPPC - Primitive collections.
- JCTools - Concurrency tools currently missing from the JDK.
- Koloboke - Hash sets and hash maps.
- Async Http Client - Asynchronous HTTP and WebSocket client library.
- Feign - HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.
- OkHttp - HTTP+SPDY client.
- Play WS - Typesafe client with reactive streams and caching.
- restQL-core - Microservice query language that fetches information from multiple services.
- Retrofit - Typesafe REST client.
- Ribbon - Client-side IPC library that is battle-tested in cloud.
- Riptide - Client-side response routing for Spring's RestTemplate.
- JSON-LD - JSON-LD implementation.
- Siren4J - Library for the Siren specification.
- Eclipse - Established open-source project with support for lots of plugins and languages.
- IntelliJ IDEA ![c - Supports many JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector.
- NetBeans - Provides integration for several Java SE and EE features, from database access to HTML5.
- Visual Studio Code - Provides Java support for lightweight projects with a simple, modern workflow by using extensions from the internal marketplace.
- Imgscalr - Simple, efficient and hardware-accelerated image-scaling library implemented in pure Java 2D.
- Tess4J - A JNA wrapper for Tesseract OCR API.
- Thumbnailator - High-quality thumbnail generation library.
- TwelveMonkeys - Collection of plugins that extend the number of supported image file formats.
- ZXing - Multi-format 1D/2D barcode image processing library.
- DSL-JSON - JSON library with advanced compile time databinding.
- Genson - Powerful and easy-to-use Java-to-JSON conversion library.
- Gson - Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.
- HikariJSON - High-performance JSON parser, 2x faster than Jackson.
- jackson-modules-java8 - Set of Jackson modules for Java 8 datatypes and features.
- Jackson-datatype-money - Open-source Jackson module to support JSON serialization and deserialization of JavaMoney data types.
- Jackson - Similar to GSON, but offers performance gains if you need to instantiate the library more often.
- JSON-io - Convert Java to JSON. Convert JSON to Java. Pretty print JSON. Java JSON serializer.
- jsoniter - Fast and flexible library with iterator and lazy parsing API.
- LoganSquare - JSON parsing and serializing library based on Jackson's streaming API. Outperforms GSON & Jackson's library.
- Moshi - Modern JSON library, less opinionated and uses built-in types like List and Map.
- Yasson - Binding layer between classes and JSON documents similar to JAXB.
- fastjson - Very fast processor with no additional dependencies and full data binding.
- Jolt - JSON to JSON transformation tool.
- JsonPath - Extract data from JSON using XPATH-like syntax.
- JsonSurfer - Streaming JsonPath processor dedicated to processing big and complicated JSON data.
- Avian - JVM with both JIT and AOT modes. Includes an iOS port.
- Graal - Polyglot virtual machine which can be embedded.
- OpenJ9 - High performance, enterprise calibre, flexibly licensed, openly governed cross platform Java Virtual Machine extending and augmenting the runtime technology components from the Eclipse OMR and OpenJDK project.
- OpenJDK - Open-source implementation for Linux.
- ParparVM - VM with non-blocking, concurrent GC for iOS.
- Zulu OpenJDK 9 - Early-access OpenJDK 9 builds for Windows, Linux, and Mac OS X.
- Zulu OpenJDK - OpenJDK builds for Windows, Linux, and Mac OS X through Java 8.
- Apache Log4j 2 - Complete rewrite with a powerful plugin and configuration architecture.
- Graylog - Open-source aggregator suited for extended role and permission management.
- Kibana - Analyzes and visualizes log files. Some features require payment.
- Logback - Robust logging library with interesting configuration options via Groovy.
- Logbook - Extensible, open-source library for HTTP request and response logging.
- Logstash - Tool for managing log files.
- SLF4J - Abstraction layer/simple logging facade.
- tinylog - Lightweight logging framework with static logger class.
- Tracer - Call tracing and log correlation in distributed systems.
- Apache Flink - Fast, reliable, large-scale data processing engine.
- Apache Mahout - Scalable algorithms focused on collaborative filtering, clustering and classification.
- Apache Spark - Data analytics cluster-computing framework.
- DatumBox - Provides several algorithms and pre-trained models for natural language processing.
- DeepDive - Creates structured information from unstructured data and integrates it into an existing database.
- Deeplearning4j - Distributed and multi-threaded deep learning library.
- H2O - Analytics engine for statistics over big data.
- JSAT - Algorithms for pre-processing, classification, regression, and clustering with support for multi-threaded execution.
- Oryx 2 - Framework for building real-time, large-scale machine learning applications. Includes end-to-end applications for collaborative filtering, classification, regression, and clustering.
- Smile - The Statistical Machine Intelligence and Learning Engine provides a set of machine learning algorithms and a visualization library.
- Weka - Collection of algorithms for data mining tasks ranging from pre-processing to visualization.
- Aeron - Efficient, reliable, unicast and multicast message transport.
- Apache ActiveMQ - Message broker that implements JMS and converts synchronous to asynchronous communication.
- Apache Camel - Glues together different transport APIs via Enterprise Integration Patterns.
- Apache Kafka - High-throughput distributed messaging system.
- Apache Pulsar - Distributed pub/sub-messaging system.
- Apache RocketMQ - A fast, reliable, and scalable distributed messaging platform.
- EventBus - Simple publish/subscribe event bus.
- Hermes - Fast and reliable message broker built on top of Kafka.
- JeroMQ - Implementation of ZeroMQ.
- Nakadi - Provides a RESTful API on top of Kafka.
- Smack - Cross-platform XMPP client library.
- Codename One - Cross-platform solution for writing native mobile apps.
- CQEngine - Ultra-fast, SQL-like queries on Java collections.
- Design Patterns - Implementation and explanation of the most common design patterns.
- Failsafe - Simple failure handling with retries and circuit breakers.
- FF4J - Feature Flags for Java.
- FizzBuzz Enterprise Edition - No-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.
- J2ObjC - Java-to-Objective-C translator for porting Android libraries to iOS.
- JavaX - Reinventing and extending Java with a focus on simplicity.
- JBake - Static website generator.
- JBot - Framework for building chatbots.
- Jimfs - In-memory file system.
- Joda-Money - Basic currency and money classes and algorithms not provided by the JDK.
- JPad - Snippet runner.
- Lanterna - Easy console text-GUI library, similar to curses.
- LightAdmin - Pluggable CRUD UI library for rapid application development.
- Maven Wrapper - Analogue of Gradle Wrapper for Maven, allows building projects without installing maven.
- Membrane Service Proxy - An open-source, reverse-proxy framework written in Java.
- MinimalFTP - Lightweight, small and customizable FTP server.
- Modern Java - A Guide to Java 8 - Popular Java 8 guide.
- Modernizer - Detect uses of legacy Java APIs.
- Multi-OS Engine - An open-source, cross-platform engine to develop native mobile (iOS, Android, etc.) apps.
- OpenRefine - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases.
- Polyglot for Maven - Extensions for Maven 3.3.1+ that allows writing the POM model in dialects other than XML.
- Smooks - Extensible framework for building applications that process data which means bindings, transformations, message processing and enrichment.
- Togglz - Implementation of the Feature Toggles pattern.
- TypeTools - Tools for resolving generic types.
- XMLBeam - Processes XML by using annotations or XPath within code.
- OctoLinker - Browser extension which allows to navigate through code on GitHub more efficiently.
- Apollo - Libraries for writing composable microservices.
- consul-api - Client for the [Consul](https://www.consul.io) API: a distributed, highly available and datacenter-aware registry/discovery service.
- Eureka - REST-based service registry for resilient load balancing and failover.
- Lagom - Framework for creating microservice-based systems.
- Micronaut - Modern full-stack framework with focus on modularity, minimal memory footprint and startup time.
- AppDynamics ![c - Performance monitor.
- Automon - Combines the power of AOP with monitoring and/or logging tools.
- BugSnag ![c - Exception and error monitoring with an integration of several third party tools for a better workflow and a free hobbyist tier.
- LeakCanary - Memory leak detection.
- Failsafe Actuator - Out of the box monitoring of Failsafe Circuit Breaker in Spring-Boot environment.
- Glowroot - Open-source Java APM.
- inspectIT - 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.
- Instrumental ![c - Real-time Java application performance monitoring. A commercial service with free development accounts.
- JavaMelody - Performance monitoring and profiling.
- 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.
- Jolokia - JMX over REST.
- Kamon - Tool for monitoring applications running on the JVM.
- Metrics - Expose metrics via JMX or HTTP and send them to a database.
- New Relic ![c - Performance monitor.
- nudge4j - Remote developer console from the browser for Java 8 via bytecode injection.
- OverOps ![c - In-production error monitoring and debugging.
- Pinpoint - Open-source APM tool.
- Prometheus - Provides a multi-dimensional data model, DSL, autonomous server nodes and much more.
- SPM ![c - Performance monitor with distributing transaction tracing for JVM apps.
- Stagemonitor - Open-source performance monitoring and transaction tracing for JVM apps.
- Sysmon - Lightweight platform monitoring tool for Java VMs.
- zipkin - Distributed tracing system which gathers timing data needed to troubleshoot latency problems in microservice architectures.
- JavaCPP - Provides efficient and easy access to native C++.
- JNA - Work with native libraries without writing JNI. Also provides interfaces to common system libraries.
- JNR - 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).
- CogCompNLP - Provides common annotators for plain text input.
- CoreNLP - Provides a set of fundamental tools for tasks like tagging, named entity recognition, and sentiment analysis.
- DKPro - Collection of reusable NLP tools for linguistic pre-processing, machine learning, lexical resources, etc.
- LingPipe - Toolkit for tasks ranging from POS tagging to sentiment analysis.
- Comsat - Integrates standard Java web-related APIs with Quasar fibers and actors.
- Dubbo - High-performance RPC framework.
- Finagle - Extensible RPC system for constructing high-concurrency servers. It implements uniform client and server APIs for several protocols, and is protocol-agnostic to simplify implementation of new protocols.
- Grizzly - NIO framework. Used as a network layer in Glassfish.
- gRPC - RPC framework based on protobuf and HTTP/2.
- KryoNet - Provides a clean and simple API for efficient TCP and UDP client/server network communication using NIO and Kryo.
- MINA - Abstract, event-driven async I/O API for network operations over TCP/IP and UDP/IP via Java NIO.
- Netty - Framework for building high-performance network applications.
- Nifty - Implementation of Thrift clients and servers on Netty.
- sshj - Programatically use SSH, SCP or SFTP.
- Undertow - Web server providing both blocking and non-blocking APIs based on NIO. Used as a network layer in WildFly.
- urnlib - Represent, parse and encode URNs, as in RFC 2141.
- Apache Cayenne - Provides a clean, static API for data access. Also includes a GUI Modeler for working with database mappings, and DB reverse engineering and generation.
- Ebean - Provides simple and fast data access.
- EclipseLink - Supports a number of persistence standards: JPA, JAXB, JCA and SDO.
- Hibernate - Robust and widely used, with an active community.
- MyBatis - Couples objects with stored procedures or SQL statements.
- SimpleFlatMapper - Simple database and CSV mapper.
- AWS Elastic Beanstalk ![c - AWS-based, with support for Tomcat and Jetty.
- AWS Lambda ![c - Serverless computation.
- Google App Engine ![c - PaaS on Google's infrastructure.
- Heroku ![c - Abstract computing environments.
- Jelastic ![c - Supports Tomcat, Jetty, GlassFish, JBoss, TomEE and WildFly.
- OpenShift Enterprise ![c - On-premise solution.
- Apache FOP - Creates PDFs from XSL-FO.
- Apache PDFBox - Toolbox for creating and manipulating PDFs.
- Dynamic Jasper - Abstraction layer to JasperReports.
- DynamicReports - Simplifies JasperReports.
- flyingsaucer - XML/XHTML and CSS 2.1 renderer.
- iText ![c - Creates PDF files programmatically.
- JasperReports - Complex reporting engine.
- fastThread ![c - Analyze and visualize thread dumps with a free cloud-based upload interface.
- GCeasy ![c - Tool to analyze and visualize GC logs. It provides a free cloud-based upload interface.
- honest-profiler - A low-overhead, bias-free sampling profiler.
- jHiccup - Logs and records platform JVM stalls.
- JITWatch - Analyze the JIT compiler optimisations made by the HotSpot JVM.
- JMH - a Java harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targeting the JVM.
- JProfiler ![c - Database profiling for JDBC, JPA and NoSQL, with JEE support.
- LatencyUtils - Utilities for latency measurement and reporting.
- XRebel ![c - Real-time profiling for web applications, with an in-browser widget.
- YourKit Java Profiler ![c - Profiler for any application running on the JVM.
- Pool - Generic object pooling component.
- BCEL - Byte Code Engineering Library - analyze, create, and manipulate Java class files.
- Codec - General encoding/decoding algorithms (for example phonetic, base64, URL).
- Compress - Defines an API for working with tar, zip and bzip2 files.
- IO - Collection of I/O utilities.
- Configuration - Reading of configuration/preferences files in various formats.
- VFS - Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.
- Jelly - XML based scripting and processing engine.
- CSV - Component for reading and writing comma separated value files.
- JCS - Java Caching System.
- Email - Library for sending e-mail from Java.
- DbUtils - JDBC helper library.
- FileUpload - File upload capability for your servlets and web applications.
- Lang - Provides extra functionality for classes in java.lang.
- Jexl - Expression language which extends the Expression Language of the JSTL.
- CLI - Command Line arguments parser.
- Validator - Framework to define validators and validation rules in an xml file.
- Net - Collection of network utilities and protocol implementations.
- RNG - Commons Rng provides implementations of pseudo-random numbers generators.
- RDF - Common implementation of RDF 1.1 that could be implemented by systems on the JVM.
- Weaver - Provides an easy way to enhance (weave) compiled bytecode.
- BeanUtils - Easy-to-use wrappers around the Java reflection and introspection APIs.
- Collections - Extends or augments the Java Collections Framework.
- DBCP - Database connection pooling services.
- Math - Lightweight, self-contained mathematics and statistics components.
- Exec - API for dealing with external process execution and environment management in Java.
- Logging
- OGNL - An Object-Graph Navigation Language.
- JCI - Java Compiler Interface.
- Daemon - Alternative invocation mechanism for unix-daemon-like java code.
- Functor - A functor is a function that can be manipulated as an object, or an object representing a single, generic function.
- Digester - XML-to-Java-object mapping utility.
- BSF - Bean Scripting Framework - interface to scripting languages, including JSR-223.
- Imaging - A pure-Java image library.
- SCXML - An implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.
- JXPath - Utilities for manipulating Java Beans using the XPath syntax.
- Chain - Chain of Responsibility pattern implementation.
- Proxy - Library for creating dynamic proxies.
- BeanUtils2 - Redesign of Commons BeanUtils.
- ClassScan - Find Class interfaces, methods, fields, and annotations without loading.
- CLI2
- Convert - Commons-Convert aims to provide a single library dedicated to the task of converting an object of one type to another.
- Finder - Java library inspired by the UNIX find command.
- Flatfile - Java library for working with flat data structures.
- Graph - A general purpose Graph APIs and algorithms.
- I18n - Adds the feature of localized message bundles that consist of one or many localized texts that belong together.
- Id - Id is a component used to generate identifiers.
- Javaflow - Continuation implementation to capture the state of the application.
- JNet - JNet allows to use dynamically register url stream handlers through the java.net API.
- Monitoring - Monitoring aims to provide a simple but extensible monitoring solution for Java applications.
- Nabla - Nabla provides automatic differentiation classes that can generate derivative of any function implemented in the Java language.
- OpenPGP - Interface to signing and verifying data using OpenPGP.
- Performance - A small framework for microbenchmark clients, with implementations for Commons DBCP and Pool.
- Pipeline - Provides a set of pipeline utilities designed around work queues that run in parallel to sequentially process data objects.
- CUBA Platform - High-level framework for developing enterprise applications with a rich web interface, based on Spring, EclipseLink and Vaadin.
- Light-Java - A fast, lightweight and productive microservices framework with built-in [security](https://github.com/networknt/light-oauth2).
- Orienteer - Open-source business application platform for rapid configuration/development of CRM, ERP, LMS and other applications.
- Spring - Provides many packages for dependency injection, aspect-oriented programming, security, etc.
- ch.vorburger.exec - Convenient API around Apache Commons Exec.
- zt-exec - Provides a unified API to Apache Commons Exec and ProcessBuilder.
- zt-process-killer - Stops processes started from Java or the system processes via PID.
- Akka - Toolkit and runtime for building concurrent, distributed, fault-tolerant and event-driven applications.
- Reactive Streams - Provides a standard for asynchronous stream processing with non-blocking backpressure.
- Reactor - Library for building reactive fast-data applications.
- RxJava - Allows for composing asynchronous and event-based programs using observable sequences.
- vert.x - Polyglot event-driven application framework.
- Dropwizard - Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics.
- Jersey - JAX-RS reference implementation.
- Microserver - monolith and pure microservices styles.
- Rapidoid - A simple, secure and extremely fast framework consisting of an embedded HTTP server, GUI components and dependency injection.
- 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.
- RESTEasy - Fully certified and portable implementation of the JAX-RS specification.
- RestExpress - Thin wrapper on the JBoss Netty HTTP stack that provides scaling and performance.
- Restlet Framework - Pioneering framework with powerful routing and filtering capabilities, and a unified client and server API.
- Spark - Sinatra inspired framework.
- Crnk - 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.
- Swagger - Standard, language-agnostic interface to REST APIs.
- DataMelt - Environment for scientific computation, data analysis and data visualization.
- Erdos - Modular, light and easy graph framework for theoretic algorithms.
- GraphStream - Library for modeling and analyzing dynamic graphs.
- JGraphT - Graph library that provides mathematical graph-theory objects and algorithms.
- JGraphX - Library for visualizing (mainly Swing) and interacting with node-edge graphs.
- Mines Java Toolkit - Library for geophysical scientific computation, visualization and digital signal analysis.
- Morpheus - 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.
- Tablesaw - Includes a data-frame, an embedded column store, and hundreds of methods to transform, summarize, or filter data.
- Apache Lucene - High-performance, full-featured, cross-platform, text search engine library.
- Apache Solr - Enterprise search engine optimized for high-volume traffic.
- Elasticsearch - Distributed, multitenant-capable, full-text search engine with a RESTful web interface and schema-free JSON documents.
- Apache Shiro - Performs authentication, authorization, cryptography and session management.
- Bouncy Castle - All-purpose cryptographic library and JCA provider offering a wide range of functions, from basic helpers to PGP/SMIME operations.
- Cryptomator - Multiplatform, transparent, client-side encryption of files in the cloud.
- 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.
- jjwt - JSON web token for Java and Android.
- Jwks RSA - JSON Web Key Set parser.
- Keycloak - Integrated SSO and IDM for browser apps and RESTful web services.
- Keyczar - Easy-to-use, safe encryption framework with key versioning.
- Keywhiz - System for distributing and managing secrets.
- Nbvcxz - Advanced password strength estimation.
- OACC - Provides permission-based authorization services.
- pac4j - Security engine.
- PicketLink - Umbrella project for security and identity management.
- Tink - Provides a simple and misuse-proof API for common cryptographic tasks.
- 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.
- Vault - Secures, stores, and tightly controls access to tokens, passwords, certificates, API keys, and other secrets. It handles leasing, key revocation, key rolling, and auditing. Through a unified API, users can access an encrypted Key/Value store and network encryption-as-a-service, or generate AWS IAM/STS credentials, SQL/NoSQL databases, X.509 certificates, SSH credentials, and more.
- FlatBuffers - Memory-efficient serialization library that can access serialized data without unpacking and parsing it.
- FST - JDK-compatible, high-performance object graph serialization.
- Kryo - Fast and efficient object graph serialization framework.
- MessagePack - Efficient binary serialization format.
- PHP Serializer - Serializing objects in the PHP serialization format.
- Apache Tomcat - Robust, all-round server for Servlet and JSP.
- Apache TomEE - Tomcat plus Java EE.
- Jetty - Provides a Web server and javax.servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.
- nanohttpd - Tiny, easily embeddable HTTP server.
- WebSphere Liberty - Lightweight, modular server developed by IBM.
- WildFly - Formerly known as JBoss and developed by Red Hat with extensive Java EE support.
- Handlebars.java - Logicless and semantic Mustache templates.
- Jade4J - Implementation of Pug (formerly known as Jade).
- Jtwig - Modular, configurable and fully tested template engine.
- Pebble - 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.
- Thymeleaf - Aims to be a substitute for JSP and works for XML files.
- Awaitility - DSL for synchronizing asynchronous operations.
- ConcurrentUnit - Toolkit for testing multi-threaded and asynchronous applications.
- GreenMail - In-memory email server for integration testing. Supports SMTP, POP3 and IMAP including SSL.
- Hoverfly Java - Native bindings for Hoverfly, a proxy which allows you to simulate HTTP services.
- REST Assured - DSL for easy testing of REST/HTTP services.
- Cucumber - Provides a way to describe features in a plain language which customers can understand.
- Cukes-REST - A collection of Gherkin steps for REST-service testing using Cucumber.
- J8Spec - Follows a Jasmine-like syntax.
- JBehave - Extensively configurable framework that describes stories.
- JGiven - Provides a fluent API which allows for simpler composition.
- Lamdba Behave - Aims to provide a fluent API to write tests in long and descriptive sentences that read like plain English.
- Beanmother - Sets up beans from YAML fixtures.
- Fixture Factory - Generates fake objects from a template.
- JFairy - Fake data generator.
- Randomized Testing - JUnit test runner and plugins for running JUnit tests with pseudo-randomness.
- ArchUnit - Test library for specifying and asserting architecture rules.
- Apache JMeter - Functional testing and performance measurements.
- Arquillian - Integration and functional testing platform for Java EE containers.
- Citrus - Integration testing framework that focuses on both client- and server-side messaging.
- Gatling - Load testing tool designed for ease of use, maintainability and high performance.
- JUnit - Common testing framework.
- Pact JVM - Consumer-driven contract testing.
- PIT - Fast mutation-testing framework for evaluating fault-detection abilities of existing JUnit or TestNG test suites.
- AssertJ - Fluent assertions that improve readability.
- JSONAssert - Simplifies testing JSON strings.
- Truth - Google's assertion and proposition framework.
- Mutability Detector - Reports whether instances of a given class are immutable.
- raml-tester - Tests if a request/response matches a given RAML definition.
- TestContainers - Provides throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
- pojo-tester - Automatically performs tests on basic POJO methods.
- JMockit - Integration testing, API mocking and faking, and code coverage.
- Mockito - Mocking framework that lets you write tests with a clean and simple API.
- MockServer - Allows mocking of systems integrated with HTTPS.
- Moco - Concise web services for stubs and mocks.
- PowerMock - Mocks static methods, constructors, final classes and methods, private methods, and removal of static initializers.
- WireMock - Stubs and mocks web services.
- Burst - A unit testing library for varying test data.
- junit-dataprovider - A TestNG-like data provider/runner for JUnit.
- JUnitParams - Creates readable and maintainable parametrised tests.
- cactoos - Collection of object-oriented primitives.
- CRaSH - Provides a shell into a JVM that's running CRaSH. Used by Spring Boot and others.
- Dex - Java/JavaFX tool capable of powerful ETL and data visualization.
- Embulk - Bulk data loader that helps data transfer between various databases, storages, file formats, and cloud services.
- fswatch - Micro library to watch for directory file system changes, simplifying java.nio.file.WatchService
- Gephi - Cross-platform for visualizing and manipulating large graph networks.
- Guava - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and more.
- JADE - Framework and environment for building and debugging multi-agent systems.
- JavaVerbalExpressions - Library that helps with constructing difficult regular expressions.
- JGit - A lightweight, pure Java library implementing the Git version control system.
- minio-java - Provides simple APIs to access any Amazon S3-compatible object storage server.
- Protégé - Provides an ontology editor and a framework to build knowledge-based systems.
- Underscore-java - Port of Underscore.js functions.
- jabba - Java Version Manager inspired by nvm. Supports Mac OS X, Linux and Windows.
- jenv - Java Version Manager inspired by rbenv. Can configure globally or per project. Tested on Debian and Mac OS X.
- SDKMan - Java Version Manager inspired by RVM and rbenv. Supports UNIX-based platforms and Windows.
- Apache Nutch - Highly extensible, highly scalable web crawler for production environments.
- Crawler4j - Simple and lightweight web crawler.
- jsoup - Scrapes, parses, manipulates and cleans HTML.
- StormCrawler - SDK for building low-latency and scalable web crawlers.
- webmagic - Scalable crawler with downloading, url management, content extraction and persistent.
- Apache Tapestry - Component-oriented framework for creating dynamic, robust, highly scalable web applications.
- Apache Wicket - Component-based web application framework similar to Tapestry, with a stateful GUI.
- Blade - Lightweight, modular framework that aims to be elegant and simple.
- Bootique - Minimally opinionated framework for runnable apps.
- Firefly - Asynchronous framework for rapid development of high-performance web application.
- Grails - Groovy framework that provides a highly productive environment by favoring convention over configuration, no XML and support for mixins.
- Jooby - Scalable, fast and modular micro-framework that offers multiple programming models.
- Ninja - Full-stack web framework.
- Pippo - Small, highly modularized, Sinatra-like framework.
- Play - Built on Akka, it provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications in Java and Scala.
- PrimeFaces - JSF framework with both free and commercial/support versions and frontend components.
- Ratpack - Set of libraries that facilitate fast, efficient, evolvable and well-tested HTTP applications.
- Takes - Opinionated web framework which is built around the concepts of True Object-Oriented Programming and immutability.
- Vaadin - Event-driven framework built on top of GWT. Uses server-side architecture with Ajax on the client side.
- Awesome Gradle Plugins
- AwesomeJavaFX
- Awesome JVM
- Awesome Microservices
- Awesome REST
- Awesome Selenium
- ciandcd
- Useful Java Links
- r/java - Subreddit for the Java community.
- stackoverflow - Question/answer platform.
- VirtualJUG - Virtual Java User Group.
- java.libhunt.com
- Core Java Volume I--Fundamentals
- Core Java, Volume II--Advanced Features
- Effective Java (3rd Edition)
- Java Concurrency in Practice
- Thinking in Java
- Java Off Heap
- Marco Behler's Screencasts - Screencasts about modern Java development.
- The Java Council
- The Java Posse - Discontinued as of 02/2015.
- Adam Bien - Freelance author, JavaOne Rockstar speaker, consultant, Java Champion.
- Aleksey Shipilëv - Performance geek, benchmarking czar, concurrency bug hunter.
- Antonio Goncalves - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author.
- Arun Gupta - Java Champion, JavaOne Rockstar, JUG Leader, Devoxx4Kids-er, VP of Developer Advocacy at Couchbase.
- Brian Goetz - Java Language Architect at Oracle.
- Bruno Borges - Product Manager/Java Jock at Oracle.
- Chris Richardson - Software architect, consultant, and serial entrepreneur, Java Champion, JavaOne Rock Star, *POJOs in Action- author.
- Ed Burns - Consulting Member of the Technical Staff at Oracle.
- Eugen Paraschiv - Author of the Spring Security Course.
- Heinz Kabutz - Java Champion, speaker, author of The Java Specialists' Newsletter, concurrency performance expert.
- Holly Cummins - Technical Lead of IBM London's Bluemix Garage, Java Champion, developer, author, JavaOne rockstar.
- James Weaver - Java/JavaFX/IoT developer, author and speaker.
- Java EE - Official Java EE Twitter account.
- Java Magazine - Official Java Magazine account.
- Java - Official Java Twitter account.
- Javin Paul - Well-known Java blogger.
- Josh Long - Spring Advocate at Pivotal, author of O'Reilly's Cloud Native Java- and Building Microservices with Spring Boot, JavaOne Rock Star.
- Lukas Eder - Java Champion, speaker, JUG.ch co-leader, Founder and CEO Data Geekery (jOOQ).
- Mario Fusco - RedHatter, JUG coordinator, frequent speaker and author.
- Mark Heckler - Pivotal Principal Technologist and Developer Advocate, conference speaker, published author, and Java Champion, focusing on Internet of Things and the cloud.
- Mark Reinhold - Chief Architect, Java Platform Group, Oracle.
- Markus Eisele - Java EE evangelist, Red Hat.
- Martijn Verburg - London JUG co-leader, speaker, author, Java Champion and much more.
- Martin Thompson - Pasty faced performance gangster.
- Monica Beckwith - Performance consultant, JavaOne Rock Star.
- OpenJDK - Official OpenJDK account.
- Peter Lawrey - Peter Lawrey, Java performance expert.
- Randy Shoup - Stitch Fix VP Engineering, speaker, JavaOne Rock Star.
- Reza Rahman - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker.
- Simon Maple - Java Champion, VirtualJUG founder, LJC leader, RebelLabs author.
- Stephen Colebourne - Java Champion, speaker.
- Trisha Gee - Java Champion and speaker.
- Venkat Subramaniam - Author, University of Houston professor, MicroSoft MVP award recipient, JavaOne Rock Star, Java Champion.
- Google Java Style
- InfoQ
- Java Algorithms and Clients
- Java, SQL, and jOOQ
- Java.net
- Javalobby
- JavaWorld
- JAXenter
- RebelLabs
- The Takipi Blog
- TheServerSide.com
- Vanilla Java
- Voxxed
- CONTRIBUTING
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