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https://github.com/eric-erki/awesome-crystal

A collection of awesome Crystal libraries, tools, frameworks and software
https://github.com/eric-erki/awesome-crystal
List: awesome-crystal
Last synced: 23 days ago
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A collection of awesome Crystal libraries, tools, frameworks and software
Host: GitHub
URL: https://github.com/eric-erki/awesome-crystal
Owner: eric-erki
License: mit
Created: 2020-02-02T10:32:59.000Z (almost 5 years ago)
Default Branch: master
Last Pushed: 2020-02-02T10:33:34.000Z (almost 5 years ago)
Last Synced: 2024-05-21T00:38:00.037Z (7 months ago)
Language: Crystal
Size: 301 KB
Stars: 0
Watchers: 2
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- Contributing: .github/CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
Awesome Lists containing this project

ultimate-awesome - awesome-crystal - A collection of awesome Crystal libraries, tools, frameworks and software . (Programming Language Lists / Crystal Lists)
README

        


# Awesome Crystal

[![Awesome](https://awesome.re/badge.svg)](https://awesome.re)

[![Build Status](https://api.travis-ci.org/veelenga/awesome-crystal.svg)](https://travis-ci.org/veelenga/awesome-crystal)

A curated list of awesome Crystal code and resources. Inspired by [awesome](https://github.com/sindresorhus/awesome) and [awesome-awesomeness](https://github.com/bayandin/awesome-awesomeness).

The goal is to have projects mostly stable and useful for the community.

Search [Crystal Shards](https://crystalshards.xyz) or follow announcements [Crystal [ANN]](https://crystal-ann.com) for more.

Contributions are welcome. Please take a quick look at the [contribution guidelines](https://github.com/veelenga/awesome-crystal/blob/master/.github/CONTRIBUTING.md) first.

* [Awesome Crystal](#awesome-crystal)

  * [Algorithms and Data structures](#algorithms-and-data-structures)

  * [Api Builders](#api-builders)

  * [Blockchain](#blockchain)

  * [C Bindings](#c-bindings)

  * [Caching](#caching)

  * [CLI Builders](#cli-builders)

  * [CLI Utils](#cli-utils)

  * [Code Analysis and Metrics](#code-analysis-and-metrics)

  * [Compression](#compression)

  * [Configuration](#configuration)

  * [Converters](#converters)

  * [Cryptography](#cryptography)

  * [Data Formats](#data-formats)

  * [Data Generators](#data-generators)

  * [Database Drivers/Clients](#database-driversclients)

  * [Database Tools](#database-tools)

  * [Debugging](#debugging)

  * [Dependency Injection](#dependency-injection)

  * [Development Tools](#development-tools)

  * [Email](#email)

  * [Environment Management](#environment-management)

  * [Examples and funny stuff](#examples-and-funny-stuff)

  * [Feature Flipping](#feature-flipping)

  * [Framework Components](#framework-components)

  * [Game Development](#game-development)

  * [HTML Builders](#html-builders)

  * [HTML/XML parsing](#htmlxml-parsing)

  * [HTTP](#http)

  * [Image Processing](#image-processing)

  * [Implementations/Compilers](#implementationscompilers)

  * [Logging and monitoring](#logging-and-monitoring)

  * [Machine Learning](#machine-learning)

  * [Markdown/Text Processors](#markdowntext-processors)

  * [Misc](#misc)

  * [Network Protocols](#network-protocols)

  * [Networking](#networking)

  * [ORM/ODM Extensions](#ormodm-extensions)

  * [Package Management](#package-management)

  * [Processes and Threads](#processes-and-threads)

  * [Project Generators](#project-generators)

  * [Queues and Messaging](#queues-and-messaging)

  * [Routing](#routing)

  * [Scheduling](#scheduling)

  * [Science and Data analysis](#science-and-data-analysis)

  * [Search](#search)

  * [Serverless Computing](#serverless-computing)

  * [System](#system)

  * [Task management](#task-management)

  * [Template Engine](#template-engine)

  * [Testing](#testing)

  * [Third-party APIs](#third-party-apis)

  * [Validation](#validation)

  * [Web Frameworks](#web-frameworks)

  * [Web Servers](#web-servers)

* [Community](#community)

  * [Unofficial](#unofficial)

* [Resources](#resources)

  * [Official Documentation Translations](#official-documentation-translations)

* [Services and Apps](#services-and-apps)

* [Tools](#tools)

  * [DevOps](#devops)

  * [Editor Plugins](#editor-plugins)

  * [Shell Plugins](#shell-plugins)

## Algorithms and Data structures

 * [bisect](https://github.com/spider-gazelle/bisect) - Inserting values into a sorted array

 * [crie](https://github.com/c910335/crie) - Compile-time Trie

 * [CrOTP](https://github.com/philnash/crotp) - HOTP and TOTP implementation for two factor authentication

 * [crystal-diff](https://github.com/MakeNowJust/crystal-diff) - A Crystal sequence differencing implementation

 * [crystal-linked-list](https://github.com/abvdasker/crystal-linked-list) - Implementation of Linked List

 * [crystaledge](https://github.com/unn4m3d/crystaledge) - A pure Vector Math library

 * [crystalg](https://github.com/TobiasGSmollett/crystalg) - A Generic Algorithm Library

 * [crystalline](https://github.com/jtomschroeder/crystalline) - A collection of containers and algorithms

 * [edits.cr](https://github.com/tcrouch/edits.cr) - Collection of edit distance algorithms

 * [graphlb](https://github.com/mettuaditya/graphlb) - Collection of graph datastructure and algorithms

 * [hash_ring](https://github.com/TobiasGSmollett/hash_ring) - An Implementation of Consistent Hash Ring

 * [haversine](https://github.com/geocrystal/haversine) - An Implementation of the Haversine formula

 * [kd_tree](https://github.com/geocrystal/kd_tree) - An implementation of "K-Dimensional Tree" and "N-Nearest Neighbors"

 * [ksuid.cr](https://github.com/Sija/ksuid.cr) - K-Sortable Globally Unique IDs

 * [markov](https://github.com/mccallofthewild/markov) - Build Markov Chains and run Markov Processes

 * [multiset.cr](https://github.com/tcrouch/multiset.cr) - Implementation of a multiset

 * [oak](https://github.com/obsidian/oak) - A flexible Radix Tree implementation

 * [radix](https://github.com/luislavena/radix) - Radix Tree implementation

 * [ternary_search_tree](https://github.com/johnjansen/ternary_search_tree) - Ternary Search Tree

## Api Builders

 * [kemal-rest-api](https://github.com/blocknotes/kemal-rest-api) - A library to create RESTful API with Kemal

## Blockchain

 * [Cocol](https://github.com/cocol-project/cocol) - A minimal blockchain testbed

 * [secp256k1.cr](https://github.com/q9f/secp256k1.cr) - Elliptic curve used in the public-private-key cryptography

 * [SushiChain](https://github.com/SushiChain/SushiChain) - A custom blockchain platform

## C bindings

 * [asound-cr](https://github.com/TamasSzekeres/asound-cr) - Bindings for ALSA/libasound

 * [cairo-cr](https://github.com/TamasSzekeres/cairo-cr) - Bindings for [Cairo](https://cairographics.org/) graphics library

 * [clang.cr](https://github.com/crystal-lang/clang.cr) - Libclang bindings

 * [crt.cr](https://github.com/maiha/crt.cr) - Bindings for libncursesw and crt

 * [crystal-gsl](https://github.com/ruivieira/crystal-gsl) - GNU Scientific Library bindings

 * [crystal-hunspell](https://github.com/mamantoha/crystal-hunspell) - Bindings for [Hunspell](https://hunspell.github.io/)

 * [curl-crystal](https://github.com/blocknotes/curl-crystal) - Bindings for [libcurl](https://curl.haxx.se/libcurl/)

 * [duktape.cr](https://github.com/jessedoyle/duktape.cr) - Bindings for the [Duktape](https://github.com/svaarala/duktape) javascript engine

 * [gphoto2.cr](https://github.com/Sija/gphoto2.cr) - Bindings for the [libgphoto2](http://www.gphoto.org/) library

 * [icu.cr](https://github.com/olbat/icu.cr) - Bindings for the [ICU](http://site.icu-project.org/) library

 * [libnotify.cr](https://github.com/splattael/libnotify.cr) - Bindings for Libnotify

 * [pcap.cr](https://github.com/maiha/pcap.cr) - Bindings for libpcap

 * [pledge.cr](https://github.com/chris-huxtable/pledge.cr) - Bindings for OpenBSD's `pledge(2)`

 * [soundfile](https://github.com/mjago/soundfile) - Bindings for [libsndfile](http://www.mega-nerd.com/libsndfile/) library

 * [ssh2.cr](https://github.com/spider-gazelle/ssh2.cr) - Bindings for libssh2 library

 * [syslog.cr](https://github.com/chris-huxtable/syslog.cr) - Bindings for `syslog`

 * [x11-cr](https://github.com/TamasSzekeres/x11-cr) - X11 bindings

 * [x_do.cr](https://github.com/woodruffw/x_do.cr) - Bindings for libxdo ([`xdotool`](https://github.com/jordansissel/xdotool))

## Caching

 * [bloom_filter](https://github.com/crystal-community/bloom_filter) - Implementation of Bloom filter

 * [bojack](https://github.com/marceloboeira/bojack) - A non-reliable in-memory key-value store

 * [crystal-memcached](https://github.com/comandeo/crystal-memcached) - Implementation of a memcached client

 * [Nuummite](https://github.com/CodeSteak/Nuummite) - A tiny persistent embedded key-value store

## CLI Builders

 * [admiral](https://github.com/jwaldrip/admiral.cr) - A robust DSL for writing command line interfaces

 * [cli](https://github.com/mosop/cli) - Library for building command-line interface applications

 * [clicr](https://github.com/j8r/clicr) -  A simple declarative command line interface builder

 * [clim](https://github.com/at-grandpa/clim) - Slim command line interface builder

 * [commander](https://github.com/mrrooijen/commander) - Command-line interface builder

 * [optarg](https://github.com/mosop/optarg) - Yet another library for parsing command-line options and arguments

 * [OptionParser](https://crystal-lang.org/api/OptionParser.html) - command-line options processing (Crystal stdlib)

 * [Phreak](https://github.com/shinzlet/phreak) - A highly flexible Crystal CLI builder in the style of OptionParser

## CLI Utils

 * [cride](https://github.com/j8r/cride) - A light CLI text editor/IDE

 * [oq](https://github.com/Blacksmoke16/oq) - A performant, and portable jq wrapper to facilitate the consumption and output of formats other than JSON; using [jq](https://github.com/stedolan/jq) filters to transform the data.

 * [progress_bar.cr](https://github.com/TPei/progress_bar.cr) - A simple and customizable progress bar

 * [tablo](https://github.com/hutou/tablo) - A flexible terminal table generator

 * [tallboy](https://github.com/epoch/tallboy) - Generate ASCII character tables with support for spanning cells over multiple columns

 * [terminal_table.cr](https://github.com/benoist/terminal_table.cr) - Simple ASCII table generator

 * [terminimal](https://github.com/aca-labs/terminimal) - A tiny CLI toolkit for building terminal apps for humans

 * [todo](https://git.sceptique.eu/Sceptique/todo) - Todo list working in command line

## Code Analysis and Metrics

 * [ameba](https://github.com/crystal-ameba/ameba) - A static code analysis tool

## Compression

 * [Crystar](https://github.com/naqvis/crystar) - Readers and writers of Tar archive format

 * [Gzip](https://crystal-lang.org/api/Gzip.html) - readers and writers of gzip format (Crystal stdlib)

 * [snappy](https://github.com/naqvis/snappy) -  Snappy compression format reader/writer for Crystal

 * [Zip](https://crystal-lang.org/api/Zip.html) - readers and writers of zip format (Crystal stdlib)

 * [Zlib](https://crystal-lang.org/api/Zlib.html) - readers and writers of zlib format (Crystal stdlib)

 * [zstd.cr](https://github.com/didactic-drunk/zstd.cr) - Bindings for [Zstandard](https://github.com/facebook/zstd) compression library

## Configuration

 * [cr-dotenv](https://github.com/gdotdesign/cr-dotenv) - Loads .env file

 * [envyable](https://github.com/philnash/envyable.cr) -  A simple YAML to ENV config loader

 * [habitat](https://github.com/luckyframework/habitat) - Type safe configuration for your classes and modules

 * [totem](https://github.com/icyleaf/totem) - Load and parse a configuration in JSON, YAML, dotenv formats

## Converters

 * [base62.cr](https://github.com/Sija/base62.cr) - Base62 encoder/decoder, well suited for url-shortening

 * [money](https://github.com/crystal-money/money) - Handling money and currency conversion with ease (almost complete port of [RubyMoney](https://github.com/RubyMoney/money))

 * [ms](https://github.com/SuperPaintman/ms) - Library to easily convert various time formats to milliseconds and milliseconds to human readable format

 * [sass.cr](https://github.com/straight-shoota/sass.cr) - Compile SASS/SCSS to CSS ([libsass](https://github.com/sass/libsass/) binding)

 * [time_format.cr](https://github.com/vladfaust/time_format.cr) - Convert time in human readable format with ease

 * [turkish-number](https://github.com/izniburak/turkish-number) - Turn integers into the Turkish words

 * [wkhtmltopdf-crystal](https://github.com/blocknotes/wkhtmltopdf-crystal) - Bindings / wrapper for libwkhtmltox (HTML to PDF / image converter)

## Cryptography

 * [cmac](https://github.com/spider-gazelle/cmac) - Crystal implementation of Cipher-based Message Authentication Code (CMAC)

 * [openssl.cr](https://github.com/z64/openssl.cr) - This library provides binding for OpenSSL library

 * [sodium.cr](https://github.com/didactic-drunk/sodium.cr) - Crystal wrapper for the libsodium crypto API

## Data Formats

 * [BinData](https://github.com/spider-gazelle/bindata) - Binary data parser helper with an [ASN.1](https://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One) parser

 * [config.cr](https://github.com/chris-huxtable/config.cr) - Easy to use configuration format parser

 * [crinder](https://github.com/c910335/crinder) - Class based json renderer

 * [CSV](https://crystal-lang.org/api/CSV.html) - parsing and generating for comma-separated values (Crystal stdlib)

 * [front_matter.cr](https://github.com/chris-huxtable/front_matter.cr) - Separates a files front matter from its content

 * [geoip2.cr](https://github.com/delef/geoip2.cr) - GeoIP2 reader

 * [HAR](https://github.com/NeuraLegion/har) - HAR (HTTP Archive) parser

 * [INI](https://crystal-lang.org/api/INI.html) - INI file parser (Crystal stdlib)

 * [JSON](https://crystal-lang.org/api/JSON.html) - parsing and generating JSON documents (Crystal stdlib)

 * [JSON tools](https://github.com/impatienttraveller/json-tools) - An implementation of JSON Patch and Pointer RFC's

 * [JSON::OnSteroids](https://github.com/anykeyh/json_on_steroids) - handle and mutate JSON document easily

 * [maxminddb.cr](https://github.com/delef/maxminddb.cr) - MaxMindDB reader

 * [toml.cr](https://github.com/crystal-community/toml.cr) - TOML parser

 * [XML](https://crystal-lang.org/api/XML.html) - parsing and generating XML documents (Crystal stdlib)

 * [YAML](https://crystal-lang.org/api/YAML.html) - parsing and generating YAML documents (Crystal stdlib)

## Data Generators

 * [faker](https://github.com/askn/faker) - A library for generating fake data

 * [hashids.cr](https://github.com/splattael/hashids.cr) - A library to generate YouTube-like ids from one or many numbers

## Database Drivers/Clients

 * [couchdb.cr](https://github.com/TechMagister/couchdb.cr) - CouchDB client

 * [crystal-db](https://github.com/crystal-lang/crystal-db) - Common db api

 * [crystal-mysql](https://github.com/crystal-lang/crystal-mysql) - MySQL connector for Crystal

 * [crystal-pg](https://github.com/will/crystal-pg) - A Postgres driver

 * [crystal-redis](https://github.com/stefanwille/crystal-redis) - Full featured Redis client

 * [crystal-rethinkdb](https://github.com/kingsleyh/crystal-rethinkdb) - Driver for RethinkDB / RebirthDB

 * [crystal-sqlite3](https://github.com/crystal-lang/crystal-sqlite3) - SQLite3 bindings

 * [eventql-crystal](https://github.com/measurechina/eventql-crystal) - EventQL driver

 * [leveldb](https://github.com/crystal-community/leveldb) - Crystal bindings for LevelDB

 * [mongo.cr](https://github.com/ambercommunity/mongo.cr) - Binding for MongoDB C driver

 * [rocksdb.cr](https://github.com/maiha/rocksdb.cr) - RocksDB client

## Database Tools

 * [migrate](https://github.com/vladfaust/migrate.cr) - A simpler database migration tool with transactions

 * [queryit](https://github.com/hugopl/queryit) - A setupless terminal based SQL query runner.

## Debugging

 * [debug.cr](https://github.com/Sija/debug.cr) - `debug!(…)` macro for `pp`-style debugging

## Dependency Injection

 * [Crystal-DI](https://github.com/funk-yourself/crystal-di) - Lightweight DI Container

 * [syringe](https://github.com/Bonemind/syringe) - A simple and basic dependency injection shard for crystal

## Development Tools

 * [kemal-watcher](https://github.com/faustinoaq/kemal-watcher) - Kemal plugin to watch files and live-reload the browser

 * [sentry-run](https://github.com/faustinoaq/sentry-run) - Reload code changes using Sentry.run

 * [Warden](https://github.com/diggersheep/warden) - Watches files, run command and a git command if succeed on file changes

 * [watcher](https://github.com/faustinoaq/watcher) - Watch file changes using File.stat

## Email

 * [carbon](https://github.com/luckyframework/carbon) - Fun, testable, and adapter-based email library

 * [crystal-email](https://github.com/arcage/crystal-email) - Simple e-mail sending library

 * [CrystalEmail](https://git.sceptique.eu/Sceptique/CrystalEmail) - A RFC compliant Email validator

 * [sendgrid.cr](https://github.com/dlanileonardo/sendgrid.cr) - Simple Sendgrid Client

## Environment Management

 * [asdf-crystal](https://github.com/marciogm/asdf-crystal) - Plugin for asdf version manager

 * [crenv](https://github.com/pine/crenv) - Crystal version manager

 * [rcm.cr](https://github.com/maiha/rcm.cr) - Redis Cluster Manager

## Examples and funny stuff

 * [blackjack-cr](https://github.com/gdonald/blackjack-cr) - Console Blackjack

 * [clamp](https://github.com/johnjansen/clamp) - Clamp any Comparable

 * [crystal-patterns](https://github.com/crystal-community/crystal-patterns) - Examples of GOF patters

 * [crystalworld](https://github.com/vladfaust/crystalworld) - [realworld.io](https://realworld.io) back-end API implementation

 * [exercism-crystal](https://github.com/exercism/crystal) - Exercism exercises

 * [try.cr](https://github.com/maiha/try.cr) - Try monad

## Feature Flipping

 * [can_use](https://github.com/rodrigopinto/can_use) - It is a minimalist feature toggle/flag for crystal based on yaml

 * [flipper](https://github.com/metaware/flipper) - Feature flipping/flags/rollouts. Supports multiple backends

## Framework Components

 * [device_detector](https://github.com/creadone/device_detector) - Shard for detect device by user agent string

 * [Exception Page](https://github.com/crystal-loot/exception_page) - An exceptional exception page for Crystal web libraries and frameworks

 * [graphql-crystal](https://github.com/ziprandom/graphql-crystal) - [Graphql](http://graphql.org) implementation

 * [kave](https://github.com/jwoertink/kave) - Kemal API Version Extension

 * [kemal-session](https://github.com/kemalcr/kemal-session) - Session handler for Kemal

 * [multi-auth](https://github.com/msa7/multi_auth) - Standardized multi-provider OAuth2 authentication (inspired by omniauth)

 * [praetorian](https://github.com/ilanusse/praetorian) - Minimalist authorization library inspired by Pundit

 * [request_id](https://github.com/SuperPaintman/request-id) - Middleware for generates / pick up a unique request ID for Crystal servers

 * [response_time](https://github.com/SuperPaintman/response-time) - Response time for Crystal servers (pure http server, kemal, etc.)

 * [shrine.cr](https://github.com/jetrockets/shrine.cr) - File Attachment toolkit for Crystal applications. Heavily inspired by Shrine for Ruby

 * [tourmaline](https://github.com/watzon/tourmaline) - Telegram bot framework with an API loosely based on [telegraf.js](https://telegraf.js.org/)

## Game Development

 * [CrSFML](https://github.com/oprypin/crsfml) - Bindings to [SFML](https://www.sfml-dev.org/) multimedia/game library

 * [crystal-chipmunk](https://github.com/oprypin/crystal-chipmunk) - Bindings for [Chipmunk](http://chipmunk-physics.net/), a fast and lightweight 2D game physics library

 * [glove](https://github.com/ddfreyne/glove) - A library for gaming development

## HTML Builders

 * [form_builder.cr](https://github.com/westonganger/form_builder.cr) - Dead simple HTML form builder for Crystal with built-in support for many popular UI libraries such as Bootstrap

 * [html_builder](https://github.com/crystal-lang/html_builder) - DSL for creating HTML

## HTML/XML Parsing

 * [gumbo-crystal](https://github.com/blocknotes/gumbo-crystal) - Bindings for [Gumbo](https://github.com/google/gumbo-parser), an HTML5 parsing library made by Google

 * [hq.cr](https://github.com/maiha/hq.cr) - Simple wrapper for crystal-xml

 * [myhtml](https://github.com/kostya/myhtml) - Fast HTML5 Parser that includes CSS selectors

## HTTP

 * [Cable](https://github.com/cable-cr/cable) - An ActionCable "port" to Crystal, framework agnostic, 100% compatible with the ActionCable JS Client

 * [cossack](https://github.com/crystal-community/cossack) - Simple flexible HTTP client

 * [crest](https://github.com/mamantoha/crest) - Simple HTTP and REST client, inspired by the Ruby's RestClient gem

 * [crul](https://github.com/porras/crul) - Command line HTTP client

 * [cryload](https://github.com/sdogruyol/cryload) - HTTP benchmarking tool

 * [halite](https://github.com/icyleaf/halite) - Crystal HTTP Requests with a chainable REST API, built-in sessions and loggers

 * [helmet](https://github.com/EvanHahn/crystal-helmet) - Set security-related HTTP headers

 * [http-multiserver.cr](https://github.com/vladfaust/http-multiserver.cr) - Mounting multiple servers via routes (a.k.a. URL mapping)

 * [http-params-serializable](https://github.com/vladfaust/http-params-serializable) - HTTP params (de)serialization, applicable to URL queries and URL-encoded forms

 * [http-protection](https://github.com/rogeriozambon/http-protection) - Protection against typical web attacks

 * [http2](https://github.com/ysbaddaden/http2) - HTTP/2 Protocol Implementation

 * [HTTP::Client](https://crystal-lang.org/api/HTTP/Client.html) - HTTP client (Crystal stdlib)

 * [HTTP::Server](https://crystal-lang.org/api/HTTP/Server.html) - HTTP server (Crystal stdlib)

 * [HTTP::WebSocket](https://crystal-lang.org/api/HTTP/WebSocket.html) - HTTP WebSocket client (Crystal stdlib)

 * [keyer_cr](https://github.com/danielpclark/keyer_cr) - Adds HTTP GET/POST parameter parsing as a Hash-like object

 * [proxy-fetcher.cr](https://github.com/nbulaj/proxy-fetcher.cr) - Proxy lists fetching & validating library

 * [resp-crystal](https://github.com/soveran/resp-crystal) - Lightweight RESP client

 * [sse.cr](https://github.com/y2k2mt/sse.cr) - [Server-Sent Events](https://www.w3.org/TR/2009/WD-eventsource-20090421) client

## Image processing

 * [libpixel.cr](https://github.com/libpixel/libpixel.cr)

 * [magickwand-crystal](https://github.com/blocknotes/magickwand-crystal) - Bindings for [MagickWand](https://www.imagemagick.org/script/magick-wand.php), the C interface for ImageMagick processing libraries

 * [stumpy_png](https://github.com/stumpycr/stumpy_png) - Read and write PNG images

## Implementations/Compilers

 * [charly](https://github.com/charly-lang) - Charly Programming Language

 * [cltk](https://github.com/ziprandom/cltk) - A crystal port of the Ruby Language Toolkit

 * [cppize](https://github.com/unn4m3d/cppize) - Crystal-to-C++ transpiler

 * [crisp](https://github.com/rhysd/Crisp) - Lisp dialect implemented with Crystal

 * [crow](https://github.com/geppetto-apps/crow) - Transpile/compile Crystal to [Flow](https://flow.org/)

 * [LinCAS-lang](https://github.com/LinCAS-lang) - A programming language for scientific computation

 * [mint-lang](https://github.com/mint-lang/mint) - A refreshing programming language for the front-end web

 * [myst-lang](https://github.com/myst-lang/) - A practical, dynamic language designed to be written and understood as easily and efficiently as possible

 * [runic-lang](https://github.com/runic-lang) - In-design toy language

## Logging and monitoring

 * [crafana](https://github.com/spoved/crafana.cr) - A [Grafana](https://grafana.com/) library to help autogenerate dashboards

 * [crometheus](https://gitlab.com/ezrast/crometheus) - A [Prometheus](https://prometheus.io/) client library

 * [crylog](https://github.com/blacksmoke16/crylog) - Flexible logging framework based on Monolog

 * [fluent-logger-crystal](https://github.com/TobiasGSmollett/fluent-logger-crystal) - A structured logger for [Fluentd](https://www.fluentd.org/)

 * [Logger](https://crystal-lang.org/api/Logger.html) - logging utility (Crystal stdlib)

 * [statsd.cr](https://github.com/miketheman/statsd.cr) - [Statsd](https://github.com/etsy/statsd) client library

 * [syslog.cr](https://github.com/comandeo/syslog.cr) - Implementation of Syslog client

## Machine Learning

 * [ai4cr](https://github.com/drhuffman12/ai4cr) - Artificial Intelligence (based on https://github.com/SergioFierens/ai4r)

 * [Cadmium](https://github.com/cadmiumcr/cadmium) - NLP library based heavily on [natural](https://github.com/NaturalNode/natural)

 * [crystal-fann](https://github.com/NeuraLegion/crystal-fann) - FANN (Fast Artifical Neural Network) binding

 * [shainet](https://github.com/NeuraLegion/shainet) - SHAInet (Neural Network in pure crystal)

 * [tensorflow.cr](https://github.com/fazibear/tensorflow.cr) - Bindings for [TensorFlow](https://github.com/tensorflow/tensorflow)

## Markdown/Text Processors

 * [html-pipeline](https://github.com/huacnlee/html-pipeline) - HTML processing filters and utilities

 * [markd](https://github.com/icyleaf/markd) - Yet another markdown parser built for speed, Compliant to CommonMark specification

## Misc

 * [aasm.cr](https://github.com/veelenga/aasm.cr) - Easy to use finite state machine for Crystal classes

 * [any_hash.cr](https://github.com/Sija/any_hash.cr) - Recursive Hash with better JSON::Any included

 * [atomic_write.cr](https://github.com/chris-huxtable/atomic_write.cr) - Library for writing or apppending files atomically

 * [burocracia.cr](https://github.com/vnbrs/burocracia.cr) - burocracia.cr the dependecyless shard to validate, generate and format Brazilian burocracias such as CPF, CNPJ and CEP

 * [callbacks](https://github.com/vladfaust/callbacks.cr) - Expressive callbacks module

 * [circuit_breaker](https://github.com/TPei/circuit_breaker) - Implementation of the circuit breaker pattern

 * [containerregistry.cr](https://github.com/naqvis/containerregistry.cr) - Library for working with container registries

 * [CrSerializer](https://github.com/blacksmoke16/CrSerializer) - Extensible annotation based serialization/deserialization library

 * [CrSignals](https://github.com/firejox/CrSignals) - Signals/slots notification library

 * [crystal-binary_parser](https://github.com/DanSnow/crystal-binary_parser) - Binary parser

 * [crystal-web-framework-stars](https://github.com/isaced/crystal-web-framework-stars) - Web frameworks for Crystal, most starred on Github

 * [crz](https://github.com/dhruvrajvanshi/crz) - Functional programming library

 * [emoji.cr](https://github.com/veelenga/emoji.cr) - Emoji library

 * [hoop](https://github.com/0x73/hoop) - Building native OSX apps

 * [i18n.cr](https://github.com/vladfaust/i18n.cr) - Internationalization shard

 * [immutable](https://github.com/lucaong/immutable) - Implementation of thread-safe, persistent, immutable collections

 * [inflector.cr](https://github.com/phoffer/inflector.cr) - Singularize, pluralize, camelize, etc (port from ActiveSupport)

 * [lirith](https://github.com/lirith-engine/lirith) - Graphics engine

 * [m3u8](https://github.com/akiicat/m3u8) - Generate and parse m3u8 playlists for HTTP Live Streaming

 * [message_verifier.cr](https://github.com/danielwestendorf/message_verifier.cr) - Verify and generate Rails `ActiveSupport::MessageVerifier` signed tokens

 * [monads](https://github.com/alex-lairan/monads) - Monad implementation

 * [pangu.cr](https://github.com/isaced/pangu.cr) - Paranoid text spacing in Crystal

 * [pinger](https://github.com/spider-gazelle/pinger) - Ping IP addresses and DNS entries without requiring sudo

 * [port_midi](https://github.com/jimm/crystal_port_midi) - Crystal C bindings for the PortMIDI cross-platform MIDI I/O library

 * [retriable.cr](https://github.com/Sija/retriable.cr) - Simple DSL to retry failed code blocks

 * [tren](https://github.com/sdogruyol/tren) - Give your SQL some love

 * [ulid](https://github.com/SuperPaintman/ulid) - Universally Unique Lexicographically Sortable Identifier (ULID)

 * [zaru_crystal](https://github.com/szTheory/zaru_crystal) - Filename sanitization

## Network Protocols

 * [bson.cr](https://github.com/jeromegn/bson.cr) - Native BSON implementation

 * [connect-proxy](https://github.com/spider-gazelle/connect-proxy) - Connect method style of HTTP tunnelling / HTTP proxy

 * [cr-xmpp](https://github.com/naqvis/cr-xmpp) - XMPP/Jabber Library

 * [Crirc](https://github.com/Meoowww/Crirc) - IRC protocol implementation (Client, Server, Bots)

 * [crystal-json-socket](https://github.com/foi/crystal-json-socket) - JSON-socket client & server implementation. Inspired by and compatible with [node-json-socket](https://github.com/sebastianseilund/node-json-socket/) and [ruby-json-socket](https://github.com/foi/ruby-json-socket)

 * [crystal-snmp](https://github.com/spider-gazelle/crystal-snmp) - An SNMP implementation with version 1, 2c and 3 support

 * [fast_irc.cr](https://github.com/RX14/fast_irc.cr) - Fast IRC parser/generator

 * [gopher.cr](https://github.com/anicholson/gopher.cr) - Gopher server toolkit

 * [jwt](https://github.com/crystal-community/jwt) - Implementation of JWT (JSON Web Token)

 * [msgpack-crystal](https://github.com/crystal-community/msgpack-crystal) - MessagePack library

 * [OAuth](https://crystal-lang.org/api/OAuth.html) - OAuth consumer (Crystal stdlib)

 * [OAuth2](https://crystal-lang.org/api/OAuth2.html) - OAuth2 client (Crystal stdlib)

 * [OpenSSL](https://crystal-lang.org/api/OpenSSL.html) - bindings to libssl (Crystal stdlib)

 * [telnet.cr](https://github.com/spider-gazelle/telnet.cr) - Telnet protocol

 * [transfer_more](https://git.sceptique.eu/Sceptique/transfer_more) - Clone of transfer.sh to uploads files

## Networking

 * [ipaddress.cr](https://github.com/Sija/ipaddress.cr) - Library to handle IPv4 and IPv6 addresses

## ORM/ODM Extensions

 * [avram](https://github.com/luckyframework/avram) - A database wrapper for reading, writing, and migrating Postgres databases.

 * [clear](https://github.com/anykeyh/clear) - ORM specialized to PostgreSQL only but with advanced features

 * [crecto](https://github.com/Crecto/crecto) - Database wrapper, based on Ecto

 * [granite](https://github.com/amberframework/granite) - ORM for Postgres, Mysql, Sqlite

 * [jennifer.cr](https://github.com/imdrasil/jennifer.cr) - Active Record pattern implementation with flexible query chainable builder and migration system

 * [ohm-crystal](https://github.com/soveran/ohm-crystal) - Object-hash mapping library for Redis

 * [onyx-sql](https://github.com/onyxframework/sql) - DB-agnostic SQL ORM with beautiful DSL and type-safe Query builder

 * [redis-tsv.cr](https://github.com/maiha/redis-tsv.cr) - Import and export data from Redis in TSV format

 * [rethinkdb-orm](https://github.com/spider-gazelle/rethinkdb-orm) - ORM for RethinkDB / RebirthDB

 * [stal-crystal](https://github.com/soveran/stal-crystal) - Set algebra solver for Redis

 * [topaz](https://github.com/topaz-crystal/topaz) - A simple and useful db wrapper

## Package Management

 * [shards](https://github.com/crystal-lang/shards) - Dependency manager for the Crystal

## Processes and Threads

 * [await_async](https://github.com/anykeyh/await_async) - Add keywords await & async in Crystal Lang

 * [crystal-futures](https://github.com/dhruvrajvanshi/crystal-futures) - Future type implementation

 * [neph](https://github.com/tbrand/neph) - A modern command line job processor that can execute jobs concurrently

 * [promise](https://github.com/spider-gazelle/promise) - A Promise implementation with type inference

## Project Generators

 * [crystal_lib](https://github.com/crystal-lang/crystal_lib) - Automatic binding generator for native libraries

 * [fez](https://github.com/jwoertink/fez) - A Kemal application generator

 * [kgen](https://github.com/kemalyst/kemalyst-generator) - Kemalyst command line tool for console, init, generate (scaffolding), and watch.

 * [libgen](https://github.com/olbat/libgen) - Automatic bindings generator configured using JSON/YAML files

 * [wasp](https://github.com/icyleaf/wasp) - Static Site Generator

## Queues and Messaging

 * [dispatch](https://github.com/bmulvihill/dispatch) - In memory asynchronous job processing

 * [mosquito](https://github.com/robacarp/mosquito/) - Redis backed periodic and ad hoc job processing

 * [NATS.io](https://github.com/nats-io/nats.cr) - NATS client

 * [sidekiq.cr](https://github.com/mperham/sidekiq.cr) - Simple, efficient job processing

## Routing

 * [orion](https://github.com/obsidian/orion) - A minimal, rails-esque routing library

 * [router.cr](https://github.com/tbrand/router.cr) - Minimum but powerful http router for HTTP::Server

 * [toro](https://github.com/soveran/toro) - Tree Oriented Routing

## Scheduling

 * [crystime](https://gitlab.com/crystallabs/crystime) - Advanced time, calendar, schedule, and remind library

 * [schedule.cr](https://github.com/hugoabonizio/schedule.cr) - Run periodic tasks

 * [tasker](https://github.com/spider-gazelle/tasker) - A high precision scheduler including timezone aware cron jobs

## Science and Data analysis

 * [linalg](https://github.com/konovod/linalg) - Linear algebra library inspired by MATLAB and SciPy.linalg

 * [num.cr](https://github.com/crystal-data/num.cr) - Numerical computing library supporting N-Dimensional data

 * [predict.cr](https://github.com/RX14/predict.cr) - Satellite prediction library using the sgp4 model

 * [stats](https://git.sceptique.eu/Sceptique/stats) - An expressive implementation of statistical distributions

## Search

 * [hermes](https://github.com/imdrasil/hermes.cr) - Data Mapper pattern implementation for ElastiSearch

 * [query-builder](https://github.com/izniburak/query-builder) - Sql Query Builder library

 * [soegen](https://github.com/Ragmaanir/soegen) - Elasticsearch client for Crystal similar to the stretcher gem for ruby

## Serverless Computing

 * [crystal_openfaas](https://github.com/TPei/crystal_openfaas/) - Template to enable crystal as first class citizens in OpenFaaS

 * [FaaStRuby](https://faastruby.io) - Serverless Software Development Platform for Ruby and Crystal.

 * [gcf.cr](https://github.com/sam0x17/gcf.cr) - Managed execution of Crystal in Google Cloud Functions

## System

 * [baked_file_system](https://github.com/schovi/baked_file_system) - Virtual file system implementation

 * [hardware](https://github.com/crystal-community/hardware) - Get CPU, Memory and Network informations of the running OS and its processes

## Task management

 * [cake](https://github.com/axvm/cake) - Production-ready Make-like utility tool

 * [sam](https://github.com/imdrasil/sam.cr) - Another one Rake-like task manager with namespacing and arguments system

## Template Engine

 * [crinja](https://github.com/straight-shoota/crinja) - An implementation of the [Jinja2 template engine](http://jinja.pocoo.org/)

 * [crustache](https://github.com/MakeNowJust/crustache) - [{{Mustache}}](https://mustache.github.io) for Crystal

 * [ECR (Embedded Crystal)](https://crystal-lang.org/api/ECR.html) - compile time template language which uses plain crystal expressions (Crystal stdlib)

 * [Jbuilder](https://github.com/shootingfly/jbuilder) - Generate JSON objects with a Builder-style DSL, inspired by jbuilder

 * [Kilt](https://github.com/jeromegn/kilt) - Abstraction layer for template engines

 * [Slang](https://github.com/jeromegn/slang) - Lightweight, terse, templating language inspired by Ruby's Slim

 * [teeplate](https://github.com/mosop/teeplate) - A library for rendering multiple template files

## Testing

 * [crotest](https://github.com/emancu/crotest) - A tiny and simple test framework

 * [crytic](https://github.com/hanneskaeufler/crytic) - Mutation testing framework

 * [LuckyFlow](https://github.com/luckyframework/lucky_flow) - Automated browser tests similar to Capybara

 * [mass-spec](https://github.com/c910335/mass-spec) - Web API testing library

 * [microtest](https://github.com/Ragmaanir/microtest) - Small opinionated testing library focusing on power asserts

 * [minitest.cr](https://github.com/ysbaddaden/minitest.cr) - Library for unit tests and assertions

 * [mocks.cr](https://github.com/waterlink/mocks.cr) - Mocking library for Crystal

 * [Spec](https://crystal-lang.org/api/Spec.html) - spec framework (Crystal stdlib)

 * [spectator](https://gitlab.com/arctic-fox/spectator) - Feature rich spec framework that uses the modern expect syntax

 * [timecop.cr](https://github.com/crystal-community/timecop.cr) - Library for mocking with `Time.now`. Inspired by the [timecop ruby gem](https://github.com/travisjeffery/timecop)

 * [vcr](https://github.com/spoved/vcr.cr) - A HTTP capture and replay implementation for crystal

 * [webdriver_pump](https://github.com/bwilczek/webdriver_pump) - Page Object library. Inspired by Ruby's [WatirPump](https://github.com/bwilczek/watir_pump)

 * [webmock.cr](https://github.com/manastech/webmock.cr) - Library for stubbing `HTTP::Client` requests

## Third-party APIs

 * [aws-credentials](https://github.com/y2k2mt/aws-credentials) - Get AWS credentials in various ways

 * [aws-signer.cr](https://github.com/beanieboi/aws-signer.cr) - This library signs your HTTP requests using AWS v4

 * [awscr-s3](https://github.com/taylorfinnell/awscr-s3) - AWS S3 interface

 * [awscr-signer](https://github.com/taylorfinnell/awscr-signer) - Sign HTTP::Request objects and generate presigned post forms

 * [bugsnag.cr](https://github.com/gewo/bugsnag.cr) - Bugsnag exception notifier and sidekiq middleware

 * [crystal-consul](https://github.com/rogerwelin/crystal-consul) - Consul API client

 * [crystal-darksky](https://github.com/sb89/crystal-darksky) - Wrapper for the [Dark Sky](https://darksky.net) API

 * [crystal-github](https://github.com/felipeelias/crystal-github) - Wrapper for the [Github](https://github.com/) API

 * [crystal-swapi](https://github.com/sb89/crystal-swapi) - Star Wars API (SWAPI) wrapper

 * [crystal_slack](https://github.com/manastech/crystal_slack) - A tool that parses Slack slash commands or send incoming web hooks

 * [discordcr](https://github.com/meew0/discordcr) - A minimalist Discord API library

 * [GDAX](https://github.com/mccallofthewild/gdax) - GDAX REST and WebSocket API Wrapper with request signing

 * [gitlab.cr](https://github.com/icyleaf/gitlab.cr) - GitLab API wrapper

 * [google_maps_api](https://github.com/fridgerator/google_maps_api) - Google Maps API

 * [kube-client.cr](https://github.com/spoved/kube-client.cr) - Kubernetes API Client

 * [mixpanel-crystal](https://github.com/petoem/mixpanel-crystal) - A library for sending events to Mixpanel

 * [pinboard.cr](https://github.com/oz/pinboard.cr) - [Pinboard](https://pinboard.in) API

 * [raven.cr](https://github.com/sija/raven.cr) - Raven is a client for [Sentry](https://github.com/getsentry/sentry)

 * [twitter-crystal](https://github.com/sferik/twitter-crystal) - A library to access the Twitter API

 * [ynab.cr](https://github.com/jaredsmithse/ynab.cr) - A library to interact with your YNAB data

## Validation

 * [accord](https://github.com/neovintage/accord) - Shareable validation library for Crystal Objects

 * [assert](https://github.com/blacksmoke16/assert) - Extensible annotation based object validation library

 * [denetmen](https://github.com/izniburak/denetmen) - Micro check library that patches Crystal stdlib

 * [validations](https://github.com/vladfaust/validations.cr) - Validations mixin

## Web Frameworks

 * [amber](https://github.com/amberframework/amber) - Open source efficient and cohesive web application framework

 * [athena](https://github.com/blacksmoke16/athena) - Modular, annotation based, API oriented framework with built in param conversion

 * [grip](https://github.com/grkek/grip) - Class oriented fork of the Kemal framework based on a JSON request/response model

 * [kemal](https://github.com/kemalcr/kemal) - Lightning Fast, Super Simple web framework. Inspired by Sinatra

 * [lucky](https://github.com/luckyframework/lucky) - Catch bugs early, forget about most performance issues, and spend more time on code instead of debugging and writing tests

 * [spider-gazelle](https://github.com/spider-gazelle/spider-gazelle) - A Rails esque web framework with a focus on speed and extensibility

## Web Servers

 * [serve](https://github.com/SuperPaintman/serve) - Command line static HTTP server

# Community

 * [Crystal weekly newsletters](http://crystalweekly.com/)

 * [Gitter](https://gitter.im/crystal-lang/crystal)

 * [Google Group](https://groups.google.com/forum/?fromgroups#!forum/crystal-lang)

 * [IRC](http://irc.lc/freenode/crystal-lang) - #crystal-lang on Freenode

 * [Metaruby](https://metaruby.com/c/crystal-forum) - Crystal Forum on Metaruby

 * [Reddit](https://www.reddit.com/r/crystal_programming/)

 * [Stackoverflow](https://stackoverflow.com/tags/crystal-lang/info)

## Unofficial

 * [Chinese-speaking Telegram Group](https://t.me/crystal_cn) - 来吧！TG 中文圈的朋友们！

 * [Crystal Programming Discord Server](https://discord.gg/YS7YvQy) - Unofficial Discord server dedicated to the Crystal Programming Language

 * [Russian-speaking Telegram Group](https://t.me/crystal_ru) - Добро пожаловать, товарищ!

# Resources

 * [Crystal for Rubyists](http://www.crystalforrubyists.com/) - Free book to bootstrap your Crystal journey

 * [Crystal Mastery](https://crystalmastery.io/) - Screencasts for learning Crystal

 * [crystal-lang.org](https://crystal-lang.org) - Official language site

 * [devdocs.io](https://devdocs.io/crystal/) - API Documentation Browser with Crystal support

 * [getgood.at](https://getgood.at/in-a-day/crystal) - Learn Crystal in a Day

 * [Programming Crystal](https://pragprog.com/book/crystal/programming-crystal) - PragProg book to start your Crystal journey

## Official Documentation Translations

 * [br.crystal-lang.org](http://br.crystal-lang.org/) - Brazilian

 * [ja.crystal-lang.org](http://ja.crystal-lang.org/) - Japanese

 * [kr.crystal-lang.org](https://kr.crystal-lang.org/) - Korean

 * [ru.crystal-lang.org](http://ru.crystal-lang.org/) - Russian

 * [tw.crystal-lang.org](http://tw.crystal-lang.org/) - Chinese Traditional

# Services and Apps

 * [carc.in](https://carc.in/) - A web service that runs your code and displays the result

 * [cry](https://github.com/elorest/cry) - Ability to execute crystal code in a fashion similar to Ruby's pry edit

 * [Crystal [ANN]](https://crystal-ann.com) - Announce new project, blog post, version update or any other Crystal work

 * [crystalshards.herokuapp.com](https://crystalshards.herokuapp.com/), [crystalshards.xyz](http://crystalshards.xyz/) - Web services that list all available Crystal shards

 * [Crystular](http://www.crystular.org) - Regular expression tester

 * [DeBot](https://github.com/jhass/DeBot) - IRC bot written in Crystal

 * [Fluence](https://github.com/docelic/fluence) - WYSIWYG wiki using markdown and Git

 * [icr](https://github.com/crystal-community/icr) - Interactive console for Crystal (like IRB for Ruby)

 * [Invidious](https://github.com/omarroth/invidious) - Invidious is an alternative front-end to YouTube

 * [mpngin](https://github.com/thewalkingtoast/mpngin) - A URL shortener with simple stats

 * [quicktype](https://quicktype.io/) - Generate models and serializers from JSON, JSON Schema, GraphQL, and TypeScript

 * [shards.info](http://shards.info/) - Web service that lists all repositories on GitHub that have Crystal code in them. The sources are available on [GitHub](https://github.com/mamantoha/shards-info)

 * [wikicr](https://git.sceptique.eu/Sceptique/wikicr) - Wiki using git to manage revisions

# Tools

 * [ast_helper](https://github.com/bcardiff/crystal-ast-helper) - Helper tool to debug parser and formatter

 * [crystal-base](https://github.com/ruivieira/crystal-base) - CentOS base docker image for Crystal development

 * [crystal-ctags](https://github.com/SuperPaintman/crystal-ctags) - Ctags generator for Crystal

 * [crystal-dash-docset](https://github.com/Sija/crystal-dash-docset) - [Dash](https://kapeli.com/dash) docset generator

## DevOps

 * [ansible-crystal](https://github.com/CorbanR/ansible-crystal) - Ansible playbook for installing crystal

 * [crystal-cookbook](https://github.com/vjdhama/crystal-cookbook) - Chef cookbook for installing crystal

 * [DPPM](https://github.com/DFabric/dppm) - An easy, universal way to install and manage applications as packages (mostly Linux)

## Editor Plugins

 * Atom

   * [crystal-tools](https://atom.io/packages/crystal-tools) - Enables built in tools in Crystal compiler

   * [language-crystal-actual](https://atom.io/packages/language-crystal-actual) - Crystal language support in Atom

 * Emacs

   * [emacs-crystal-mode](https://github.com/dotmilk/emacs-crystal-mode) - Crystal language support for Emacs

   * [play-crystal.el](https://github.com/veelenga/play-crystal.el) - [play.crystal-lang.org](https://play.crystal-lang.org/#/cr) integration in Emacs

 * [scry](https://github.com/crystal-lang-tools/scry) - Code analysis server for Crystal implementing the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/)

 * Spacemacs

   * [crystal-spacemacs-layer](https://github.com/juanedi/crystal-spacemacs-layer) - Spacemacs contribution layer for Crystal

 * Sublime

   * [sublime-crystal](https://github.com/crystal-lang-tools/sublime-crystal) - Crystal syntax highlighting for sublime Text

 * TextMate

   * [Crystal.tmbundle](https://github.com/crystal-lang-tools/Crystal.tmbundle) - Crystal syntax highlighting, compile, format command, snippets

 * Vim

   * [vim-crystal](https://github.com/rhysd/vim-crystal) - Vim filetype support for Crystal

   * [vim-slang](https://github.com/elorest/vim-slang) - Vim filetype support for Slang Templating Engine

 * Visual Studio Code

   * [vscode-crystal](https://github.com/g3ortega/vscode-crystal) - Crystal language support in VSCode

   * [vscode-crystal-ide](https://github.com/crystal-lang-tools/crystal-ide) - Crystal IDE powered by [Language Server Protocol](https://code.visualstudio.com/blogs/2016/06/27/common-language-protocol)

   * [vscode-crystal-lang](https://github.com/crystal-lang-tools/vscode-crystal-lang) - Formatter, linter and syntax highlighting for `cr` and `ecr` files

## Shell plugins

 * [crun](https://github.com/Val/crun) - Crystal Run : shebang wrapper for Crystal

 * [crystal-zsh](https://github.com/veelenga/crystal-zsh) - .oh-my-zsh plugin