Awesome Crystal

A curated list of awesome Crystal code and resources. Inspired by awesome and awesome-awesomeness.

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

Contributions are welcome. Please take a quick look at the contribution guidelines first.

• Awesome Crystal
  • Caching
  • Cli Builders
  • Configuration
  • Database Drivers
  • Data Generators
  • Environment Management
  • Implementations/Compilers
  • HTTP
  • Misc
  • Multimedia
  • Networking
  • ORM/ODM Extensions
  • Package Management
  • Project generators
  • Search
  • Security
  • Task management
  • Testing
  • Template Engine
  • Third-party APIs
  • Virtualization
  • Web Frameworks
  • Web Servers
• Community
• Resources
• Services and Apps
• Tools
  • Editor Plugins

Caching

• crystal-memcached - Implementation of a memcached client

Cli Builders

• clik - Easy command line interfaces

Configuration

• crystal-toml - TOML parser

Data Generators

• random.cr - Random number generation, provides interface for the SIMD-oriented Fast Mersenne Twister (dSFMT)

Environment Management

• crenv - Crystal version manager

Database Drivers

• crystal-mysql - Basic MySQL bindings
• crystal-pg - A Postgres driver
• crystal-redis - Full featured Redis client
• crystal-sqlite3 - SQLite3 bindings
• mongo.cr - Binding for MongoDB C Driver

Implementations/Compilers

• crisp - Lisp dialect implemented with Crystal
• crystal - Crystal itself is written in Crystal

HTTP

• crul - Command line HTTP client
• cryload - HTTP benchmarking tool
• crystal-routing - Extensible library to deal with http request and string based routing
• http_parser.cr - Wrapper for Http Parser lib
• router-simple.cr - Simple path router

Misc

• artanis - Sinatra-like DSL for the Crystal language (abusing macros)
• crdoc - CLI tool to search and open documentation
• cron_scheduler - Job scheduler with crontab patterns
• crystal-futures - Future type implementation
• crystal-mime - Mimetypes for Crystal
• crystalline - A collection of containers and algorithms
• duktape.cr - Bindings for the Duktape javascript engine
• emoji.cr - Emoji library
• evented - A micro library to publish and subscribe for Crystal objects
• html_builder - DSL for creating HTML
• syscall.cr - Raw syscall interface
• termbox-crystal - Bindings and extension library for termbox (terminal UI library)
• zlib.cr - Bindings for ZLib library

Multimedia

• crsfml - Crystal bindings to Simple and Fast Multimedia Library (through CSFML)

Networking

• amqp.cr - AMQP 0.9.1 client with RabbitMQ extensions
• bson.cr - Wrapper around libbson with a nice API
• msgpack-crystal - MessagePack library
• ssh2.cr - Library that provides binding for libssh2 library

ORM/ODM Extensions

• active_record.cr - Active Record pattern implementation
• amethyst-model- ORM Model for the Amethyst Framework

Package Management

• shards - Dependency manager for the Crystal

Project generators

• generate - A tool for generating whole Crystal project structure, or any part of it during lifetime of project

Search

• soegen - Elasticsearch client for Crystal similar to the stretcher gem for ruby

Security

• openssl.cr - Bindings for OpenSSL library

Task management

• crake - Rake-like build utility library. It is just a library, so it does not provide CLI
• lake - Rake-like task management for Crystal programs

Testing

• matchi - Collection of expectation matchers
• minitest.cr - Library for unit tests and assertions
• mock - Mocking library, inspired by the API of rspec-mocks
• mocks.cr - Mocking library for Crystal
• power_assert.cr - Powerful assertion for Crystal
• spec2.cr - Enhanced testing library
• timecop.cr - Library for mocking with Time.now. Inspired by timecop ruby gem
• webmock.cr - Library for stubbing HTTP::Client requests

Template Engine

• Bunny - A simple HTML templating language for Crystal, same syntax as erb
• crustache - {{Mustache}} for Crystal

Third-party APIs

• airbrake-crystal - A Crystal notifier for Airbrake
• crystal_brium - Access Brium's API using Crystal
• crystal_slack - A tool that parses Slack slash commands or send incoming web hooks
• shorturl.cr - A library to use URL shortening services
• soundcloud-crystal - A library to access the SoundCloud API
• twitter-crystal - A library to access the Twitter API

Virtualization

• rcpu - A virtual machine emulator and assembler

Web Frameworks

• amatista - A web framework to create quick applications
• amethyst - A Rails inspired web-framework
• carbon-crystal - A framework with Rails in mind
• chocolate - Simple web framework and template engine
• frost - Full featured MVC Web Framework, largely inspired by Ruby on Rails
• kemal - Lightning Fast, Super Simple web framework. Inspired by Sinatra
• moonshine - A minimal web framework

Web Servers

• fast-http-server - Super fast, zero configuration command line HTTP Server.
• kamber - Blog server based on Kemal
• prax.cr - Rack proxy server for development

Community

• Crystal Shards on Twitter
• Crystal weekly newsletters
• Google Group
• Reddit
• Slack Group
• Stackoverflow

Resources

• crystal-lang - Official language site

Services and Apps

• carc.in - A web service that runs your code and displays the result
• crystalshards - A web service that lists all available Crystal shards
• DeBot - IRC bot written in Crystal
• docrystal - A web application that hosts documentation for Crystal packages
• nes - A NES emulator

Tools

Editor Plugins

• Atom
  • crystal-tools - Enables built in tools in Crystal compiler
  • language-crystal-actual - Crystal language support in Atom
  • linter-crystal - Lint Crystal using the Crystal compiler in Atom
• Emacs
  • emacs-crystal-mode - Crystal language support for Emacs
• Sublime
  • sublime-crystal - Crystal syntax highlighting for sublime Text
• Vim
  • vim-crystal - Vim filetype support for Crystal