Awesome Crystal

Library for maintaining sorted Arrays

A pure Crystal implementation of BlurHash algorithm

Compile-time Trie in Crystal

CrOTP - One Time Passwords for Crystal

Simple linked list implementation in Crystal

A pure Crystal Vector Math library

Algorithm Library for Crystal

A collection of containers & algorithms for the Crystal programming language

Edit distance algorithms inc. Jaro, Damerau-Levenshtein, and Optimal Alignment

A Crystal port of awesome Fzy project fuzzy finder algorithm.

graphlb is a crystal library which contains all the graph Data-Structures and Algorithms implemented in crystal-lang.

Crystal implementation of the Haversine formula to calculate distances between two points given their latitudes and longitudes

Crystal implementation of "K-Dimensional Tree" and "N-Nearest Neighbors"

Crystal implementation of K-Sortable Globally Unique IDs

⛓ A Crystal library for building Markov Chains and running Markov Processes.

Multiset (bag) implementation in Crystal

a QR Code implementation written in crystal lang

Radix Tree implementation for Crystal

To be the go to platform for building dApps quickly and cheaply for business and gaming

Rapid blockchain prototyping

a native library implementing secp256k1 purely for the crystal language

libclang bindings for crystal (including automatic C bindings generator)

Bindings for libncursesw and crt class

Crystal bindings for Hunspell.

Crystal C bindings for libcurl

Evaluate JavaScript from Crystal!

Crystal shard wrapping libgphoto2

A Cystal binding/wrapper to the ICU library

Libnotify for Crystal

Crystal bindings for libpcap

Adds pledge(2) to crystal.

libssh2 binding for Crystal language

Adds syslog functionality to crystal via LibC bindings.

Crystal bindings for libxdo (xdotool)

Memcached client for Crystal language

A robust DSL for writing command line interfaces written in Crystal.

A simple declarative command line interface builder

Slim command line interface builder for Crystal.

Command-line interface builder for the Crystal programming language.

A lightweight text user interface library in Crystal

A highly flexible Crystal CLI builder in the style of OptionParser.

Tiny tool to make your CLI output 🌈 coloured

A light CLI text editor/IDE written in Crystal

Simple and straightforward large files finder utility

A performant, and portable jq wrapper to facilitate the consumption and output of formats other than JSON; using jq filters to transform the data.

A ProgressBar implementation for the Crystal programming language

Crystal text table generator

Declarative API for drawing unicode/ascii character tables in crystal lang

A static code analysis tool for Crystal

Github's Linguist but in Crystal

Crystal language Tar Module implements access to tar archives.

Google Polylines in Crystal!

Snappy compression format reader/writer for Crystal

Crystal bindings to the Zstandard (zstd) compression library

Loads ".env" files

Load environment variables from YAML

The simplest YAML to ENV config loader in Crystal

Easily configure settings for Crystal projects

Crystal configuration with spirit. Load and parse configuration in JSON, YAML, dotenv formats.

Base62 encoder/decoder for Crystal

Crystal shard for dealing with money and currency conversion

Compile Sass/SCSS to CSS in Crystal (libsass binding)

Crystal C bindings and wrapper for libwkhtmltox library

Crystal implementation of the Cipher-based Message Authentication Code (CMAC)

Crystal wrapper for the libsodium crypto API

BinData - Parsing Binary Data in Crystal Lang

Easy to use configuration and parser.

Class based json renderer in Crystal

(De)serialize any Crystal object - out of the box. Supports JSON, YAML and Byte format.

Separates a files front matter from its content

MaxMind GeoIP2 Reader for Crystal

HAR (HTTP Archive) parser in Crystal

[Crystal Lang] Handle and mutate JSON document easily

MaxMind DB Reader for Crystal

TOML parser for Crystal

Faker is a Crystal library that generates fake data for you

A Crystal shard to generate YouTube-like hashes from one or many numbers. Use hashids when you do not want to expose your database ids to the user.

A Crystal implementation of a prime number generator

CouchDB client library written in crystal

A MongoDB driver written in pure Crystal. ❄️

Common db api for crystal

a Crystal lang LDAP client

MySQL connector for Crystal

a postgres driver for crystal

Full featured Redis client for Crystal

driver for rethinkdb / rebirthdb

SQLite3 bindings for Crystal

Crystal binding for LevelDB

RocksDB client for Crystal

A database migration solution 🚜

A very basic setupless terminal based SQL query runner meant to be used as a developer tool to test queries against a project database.

Debug macro for Crystal

Robust dependency injection service container framework

Lightweight DI Container for Crystal

A compile-time, non-intrusive dependency injection system.

Basic DI for the Crystal programming language

Email library for Crystal. Testable, adapter-based, and catches bugs for you. Comes with an adapter for SendGrid.

Simple e-mail sending library

Simple lib to send mail using Sendgrid in Crystal-Lang

Crystal plugin for the asdf version manager

Crystal version manager like rbenv.

Redis Cluster Manager in Crystal

Blackjack written in Crystal

Examples of GOF patterns written in Crystal

RealWorld back-end API implementation 👍

Exercism exercises in Crystal.

Try monad for crystal

A Mediator and Observer pattern event library

Framework agnostic content negotiation library

Crystal shard for device detection by User-Agent string

An exceptional exception page for Crystal web libraries and frameworks

GraphQL server library for Crystal

a graphql implementation for crystal

Simple session handler for Kemal

Mochi Authentication

Standardized multi-provider OAuth authentication

A minimalist Crystal authorization system inspired by https://github.com/varvet/pundit.

Comprehensive security for Lucky framework

File Attachment toolkit for Crystal applications. Heavily inspired by Shrine for Ruby.

Telegram Bot framework for Crystal

Crystal bindings to SFML multimedia/game library

Crystal bindings to Chipmunk, a fast and lightweight 2D game physics library

Crystal bindings to ImGui-SFML

Entity Component System Framework writen in crystal

Crystal bindings to Dear ImGui

UI framework based on the Fusion/libui.cr library, with elements from watzon/cru.

Dead simple HTML form builder for Crystal with built-in support for many popular UI libraries such as Bootstrap

Converter .DOCX to many formats

Crystal C bindings for Gumbo library

Fast HTML5 Parser with css selectors for Crystal language

It's like ActionCable (100% compatible with JS Client), but you know, for Crystal

Simple and flexible HTTP client for Crystal with middleware and test support.

HTTP and REST client for Crystal

Command line HTTP client written in Crystal

HTTP digest auth for crystal lang

💎HTTP Requests Client with a chainable REST API, built-in sessions and middlewares.

Mount multiple web applications 🚦

The HTTP params parsing module for Crystal 🤓

This library protects against typical web attacks. It was inspired in rack-protection Ruby gem.

HTTP/2 Protocol Implementation for the Crystal Language

NTLM authentication for crystal lang

Crystal port of awesome Ruby ProxyFetcher gem

A Crystal shard for Server-Sent Events

An SVG library written in Crystal. Can be used to make cool animations, as well as other kinds of uses.

Read/Write PNG images in pure Crystal

A crystal port of the Ruby Language Toolkit

Lisp dialect implemented with Crystal

A refreshing programming language for the front-end web.

Crystal library to help autogenerate Grafana dashboards

A statsd client library for Crystal.

Artificial Intelligence for Crystal (based on https://github.com/SergioFierens/ai4r)

Natural Language Processing (NLP) library for Crystal

FANN (Fast Artifical Neural Network) binding in Crystal

MXNet (AI/ML) bindings for the Crystal language.

SHAInet - a pure Crystal machine learning library

Yet another markdown parser, Compliant to CommonMark specification, written in Crystal.

Easy to use finite state machine for Crystal classes

Better JSON::Any for Crystal

Embedded mruby for Crystal

No dependency Crystal shard to validate, generate and format Brazilian burocracias such as CPF, CNPJ and CEP

Expressive callbacks module for Crystal 🚉

Implementation of the circuit breaker pattern in crystal

A signals/slots library in Crystal

Binary parser for Crystal

⭐️ Web frameworks for Crystal, most starred on Github

Functional programming library for https://github.com/crystal-lang/crystal

Emoji for Crystal

Web API for libgphoto2

Internationalization shard 🌍

Thread-safe, persistent, immutable collections for the Crystal language

Display images within the terminal using the ITerm2 Inline Images Protocol.

Rails compatible MessageVerifier for Crystal-lang apps

Monads for Crystal

Microlibrary to perform ping requests with Crystal Lang

Crystal C bindings for the PortMIDI cross-platform MIDI I/O library

Retriable.cr is a simple DSL to retry failed code blocks

a tool for retrying code blocks

Crystal shard wrapping the rbsec/sslscan utility

Crystal tools for providing different behaviour at compile-time based on semantic versions

Web Application Firewall (WAF) Detector

Crystal shard for filename sanitization

An AMQP 0-9-1 client for Crystal

crystal lang connect / HTTP proxy implementation

XMPP/Jabber Library for Crystal

A crystal lib for irc client

JSON-socket client & server implementation. Inspired by and compatible with sebastianseilund/node-json-socket

Crystal lang implementation of the MQTT protocol, a lightweight protocol for publish/subscribe messaging

SNMP implementation for crystal lang

A fast IRC parsing library for crystal.

JWT implementation in Crystal

Crystal Lang mDNS and DNS-SD Support

MessagePack implementation in Crystal msgpack.org[Crystal]

Telnet protocol helper for crystal lang

A Crystal library to handle IPv4 and IPv6 addresses in a modern and productive way.

A Crystal database wrapper for reading, writing, and migrating Postgres databases.

Advanced ORM between postgreSQL and Crystal

Database wrapper and ORM for Crystal, inspired by Ecto

ORM Model with Adapters for mysql, pg, sqlite in the Crystal Language.

Crystal ORM using ActiveRecord pattern with flexible query DSL

A delightful SQL ORM ☺️

RethinkDB ORM for Crystal lang

Dependency manager for the Crystal language

Provide await and async methods to Crystal Lang

A modern command line job processor, similar with make command

Type aware promises for crystal lang

Dead simple task runner

Automatic binding generator for native libraries in Crystal

A Kemal application generator

Automatic C-bindings generator for the Crystal language

A generic background task runner for crystal applications supporting periodic (CRON) and manually queued jobs

Crystal client for NATS

Simple, efficient job processing for Crystal

A Crystal router

Minimum High Performance Middleware for Crystal Web Server.

Run periodic tasks in Crystal

Scheduled tasks for crystal lang

Repeatable pseudo-random sampling, CDF over most known probability distributions.

Graph plotting package with a small API and sensible defaults powered by gnuplot.

Linear algebra library based on LAPACK

Scientific computing in pure Crystal

Satellite prediction library for crystal using the sgp4 model

Quartz - A Crystal Modeling & Simulation framework

Datamapper like Crystal ORM and adapter for Elasticsearch

Elasticsearch client library for crystal, similar to rubys stretcher gem

OpenFaaS template for the crystal programming language

Extension to the crystal lang ENV module to support reading secrets

Virtual File System for Crystal language. Embedding your assets into final binary.

Get CPU, Memory and Network informations of the running OS and its processes

Cake is a powerful and flexible Make-like utility tool. Make Tasks Great Again!

Rake-like task manager

Implementation of Jinja2 template language in Crystal

{{Mustache}} for Crystal

Generate JSON objects with a Builder-style DSL, inspired by jbuilder

Generic template interface for Crystal

Slim-inspired templating language for Crystal

A Crystal library for rendering multiple template files.

A library for writing HTML in plain Crystal.

Common/helpful Spec compliant testing utilities

A tiny and simple test framework for crystal

Mutation testing for crystal.

Automated browser tests for web applications. Similar to Ruby's Capybara.

Web API testing library

Smaller test framework, because it has power asserts as the only assertion.

Test Unit for the Crystal programming language

General purpose mocking library for Crystal.

A testing library that allows "time travel," "freezing time," and "time acceleration". Inspired by the ruby-timecop library.

VCR for Crystal!

Page Object Model library for Crystal. A port (kind of) of Ruby's WatirPump

Mock HTTP::Client

This library signs your HTTP requests using AWS v4

A Crystal shard for S3.

AWS request signing in Crystal

Crystal client for Consul (http://www.consul.io/)

Dark Sky API for Crystal

Star Wars API (SWAPI) for Crystal

Parse Slack slash commands or send incoming web hooks from Crystal

📈 GDAX REST and WebSocket API wrapper to trade blockchain cryptocurrencies like bitcoin, Litecoin and Ethereum.

Gitlab.cr is a GitLab API wrapper written by Crystal

Crystal Lang Google API integration

A Web Host Metadata (https://tools.ietf.org/html/rfc6415) client for Crystal.

k8s api client

Track events on Mixpanel with Crystal

Mollie API client for Crystal http://www.mollie.com

Crystal Lang MS Graph API integration

A crystal client for the Pinboard API

Raven is a Crystal client for Sentry

Stripe API Wrapper for crystal

A library to access the Twitter API using Crystal

A WebFinger (https://tools.ietf.org/html/rfc7033) client for Crystal.

YNAB Shard for Crystal

Validations for Crystal Objects

Object/value validation library

Validations module for Crystal ✅

Data validation module for Crystal lang

A Crystal web framework that makes building applications fast, simple, and enjoyable. Get started with quick prototyping, less bugs, and blazing fast performance.

A web framework comprised of reusable, independent components

The microframework for writing powerful web applications.

Fast, Effective, Simple Web Framework

A full-featured Crystal web framework that catches bugs for you, runs incredibly fast, and helps you write code that lasts.

An api framework with simple, intuitive and consistent DSL, using jbuilder to render json. https://runcobo.github.io/docs/

Component based MVC web framework based on fort architecture targeting good code structures, modularity & performance.

A Rails esque web framework with a focus on speed and extensibility for crystal lang

The Crystal Programming Language Koans

Foreman port to crystal.

Ability to execute crystal code in a fashion similar to pry edit.

My IRC Bot

Interactive console for Crystal programming language

Invidious is an alternative front-end to YouTube

A simple and fast URL shortener with built in stats.

Helper tool to debug parser and formatter

A CentOS based docker image for Crystal work

Dash docset generator for Crystal

A small Crystal library designed to make the Public Suffix List (https://publicsuffix.org/) easier to use.

Install crystal

An easy way to install and manage server applications

Maintained at https://github.com/crystal-lang-tools/emacs-crystal-mode

Crystal support for the Geany editor

Spacemacs contribution layer for Crystal

Crystal syntax highlighting for Sublime Text

TextMate 2 Bundle Crystal

Vim filetype and tools support for Crystal language.

Vim plugin for Slim-lang in Crystal

Yet another VSCode extension for Crystal Programming Language

A Language Server Protocol implementation for Crystal. 🔮

Scry is a code analysis server for https://crystal-lang.org

Crystal Run : shebang wrapper for Crystal

.oh-my-zsh plugin for Crystal