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 the community.

Search Crystal Shards or follow announcements Crystal [ANN] for more.

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

• Awesome Crystal


• Algorithms and Data structures


• Blockchain


• C Bindings


• Caching


• CLI Builders


• CLI Utils


• Code Analysis and Metrics


• Compression


• Configuration


• Converters


• Cryptography


• Data Formats


• Data Generators


• Database Drivers/Clients


• Database Tools


• Debugging


• Dependency Injection


• Email


• Environment Management


• Examples and funny stuff


• Framework Components


• Game Development


• GUI Development


• HTML Builders


• HTML/XML parsing


• HTTP


• Image Processing


• Implementations/Compilers


• Internationalization


• Logging and monitoring


• Machine Learning


• Markdown/Text Processors


• Misc


• Network Protocols


• Networking


• ORM/ODM Extensions


• Package Management


• Processes and Threads


• Project Generators


• Queues and Messaging


• Routing


• Scheduling


• Science and Data analysis


• Search


• Serverless Computing


• System


• Task management


• Template Engine


• Testing


• Third-party APIs


• Validation


• Web Frameworks


• Community


• Unofficial


• Resources


• Official Documentation Translations


• Services and Apps


• Tools


• DevOps


• Editor Plugins


• LSP Language Server Protocol Implementations


• Shell Plugins

Algorithms and Data structures

• bisect - Inserting values into a sorted array


• blurhash.cr - BlurHash implementation


• crie - Compile-time Trie


• CrOTP - HOTP and TOTP implementation for two factor authentication


• crystal-linked-list - Implementation of Linked List


• crystaledge - A pure Vector Math library


• crystalg - A Generic Algorithm Library


• crystalline - A collection of containers and algorithms


• edits.cr - Collection of edit distance algorithms


• fzy - A Crystal port of awesome Fzy project fuzzy finder algorithm


• graphlb - Collection of graph datastructure and algorithms


• haversine - An Implementation of the Haversine formula


• kd_tree - An implementation of "K-Dimensional Tree" and "N-Nearest Neighbors"


• ksuid.cr - K-Sortable Globally Unique IDs


• markov - Build Markov Chains and run Markov Processes


• multiset.cr - Implementation of a multiset


• qr-code - QR Code generator


• radix - Radix Tree implementation


• s2_cells - S2 Geometry for spatial indexing


• splay_tree_map - Splay Tree implementation that conforms to the Hash ducktype

Blockchain

• Axentro - A custom blockchain platform


• Cocol - A minimal blockchain testbed


• secp256k1.cr - Elliptic curve used in the public-private-key cryptography

C bindings

• clang.cr - Libclang bindings


• crt.cr - Bindings for libncursesw and crt


• crystal-hunspell - Bindings for Hunspell


• curl-crystal - Bindings for libcurl


• duktape.cr - Bindings for the Duktape javascript engine


• gphoto2.cr - Bindings for the libgphoto2 library


• icu.cr - Bindings for the ICU library


• libnotify.cr - Bindings for Libnotify


• pcap.cr - Bindings for libpcap


• pledge.cr - Bindings for OpenBSD's pledge(2)


• ssh2.cr - Bindings for libssh2 library


• syslog.cr - Bindings for syslog


• x_do.cr - Bindings for libxdo (xdotool)

Caching

• crystal-memcached - Implementation of a memcached client

CLI Builders

• admiral - A robust DSL for writing command line interfaces


• clicr - A simple declarative command line interface builder


• clim - Slim command line interface builder


• commander - Command-line interface builder


• Keimeno - A lightweight text user interface library in Crystal


• OptionParser - command-line options processing (Crystal stdlib)


• Phreak - A highly flexible Crystal CLI builder in the style of OptionParser

CLI Utils

• climate - Tiny tool to make your CLI output ? coloured


• coin - Command-line application that performs currency conversion via the Fixer API


• cride - A light CLI text editor/IDE


• lff - Simple and straightforward large files finder utility in command line


• meet - Start a jitsi meeting quickly from the comfort of your command line


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


• progress_bar.cr - A simple and customizable progress bar


• tablo - A flexible terminal table generator


• tallboy - Generate ASCII character tables with support for spanning cells over multiple columns

Code Analysis and Metrics

• ameba - A static code analysis tool


• linguist.cr - Using multiple ways to find programming language used in files, based on Github's Linguist

Compression

• Crystar - Readers and writers of Tar archive format


• Gzip - readers and writers of gzip format (Crystal stdlib)


• polylines.cr — compression of series of coordinates


• snappy - Snappy compression format reader/writer for Crystal


• Zip - readers and writers of zip format (Crystal stdlib)


• Zlib - readers and writers of zlib format (Crystal stdlib)


• zstd.cr - Bindings for Zstandard compression library

Configuration

• cr-dotenv - Loads .env file


• Envy - Load environment variables from YAML


• envyable - A simple YAML to ENV config loader


• habitat - Type safe configuration for your classes and modules


• totem - Load and parse a configuration in JSON, YAML, dotenv formats

Converters

• base62.cr - Base62 encoder/decoder, well suited for url-shortening


• crunits - Tool for converting units of measure (miles to kilometers, celsius to fahrenheit etc)


• money - Handling money and currency conversion with ease (almost complete port of RubyMoney)


• sass.cr - Compile SASS/SCSS to CSS (libsass binding)


• wkhtmltopdf-crystal - Bindings / wrapper for libwkhtmltox (HTML to PDF / image converter)

Cryptography

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


• sodium.cr - Crystal wrapper for the libsodium crypto API

Data Formats

• BinData - Binary data parser helper with an ASN.1 parser


• config.cr - Easy to use configuration format parser


• crinder - Class based json renderer


• Crystalizer - (De)serialize any Crystal object; supporting JSON, YAML, and Byte formats out of the box


• CSV - parsing and generating for comma-separated values (Crystal stdlib)


• front_matter.cr - Separates a files front matter from its content


• geoip2.cr - GeoIP2 reader


• HAR - HAR (HTTP Archive) parser


• INI - INI file parser (Crystal stdlib)


• JSON - parsing and generating JSON documents (Crystal stdlib)


• JSON::OnSteroids - handle and mutate JSON document easily


• maxminddb.cr - MaxMindDB reader


• toml.cr - TOML parser


• XML - parsing and generating XML documents (Crystal stdlib)


• YAML - parsing and generating YAML documents (Crystal stdlib)

Data Generators

• faker - A library for generating fake data


• hashids.cr - A library to generate YouTube-like ids from one or many numbers


• prime - A prime number generator

Database Drivers/Clients

• couchdb.cr - CouchDB client


• cryomongo - MongoDB driver


• crystal-db - Common db api


• crystal-ldap - LDAP client


• crystal-mysql - MySQL connector for Crystal


• crystal-pg - A Postgres driver


• crystal-redis - Full featured Redis client


• crystal-rethinkdb - Driver for RethinkDB / RebirthDB


• crystal-sqlite3 - SQLite3 bindings


• leveldb - Crystal bindings for LevelDB


• rocksdb.cr - RocksDB client

Database Tools

• migrate - A simpler database migration tool with transactions


• queryit - A setupless terminal based SQL query runner

Debugging

• backtracer.cr - Shard aiming to assist with parsing backtraces into a structured form


• debug.cr - debug!(…) macro for pp-style debugging

Dependency Injection

• Athena Dependency Injection - Robust dependency injection service container framework


• Crystal-DI - Lightweight DI Container


• HardWire - A compile-time non-intrusive dependency injection system


• syringe - A simple and basic dependency injection shard for crystal

Email

• carbon - Fun, testable, and adapter-based email library


• crystal-email - Simple e-mail sending library


• CrystalEmail - A RFC compliant Email validator


• sendgrid.cr - Simple Sendgrid Client

Environment Management

• asdf-crystal - Plugin for asdf version manager


• crenv - Crystal version manager


• rcm.cr - Redis Cluster Manager

Examples and funny stuff

• blackjack-cr - Console Blackjack


• crystal-patterns - Examples of GOF patters


• crystalworld - realworld.io back-end API implementation


• exercism-crystal - Exercism exercises


• try.cr - Try monad

Framework Components

• Athena Event Dispatcher - A Mediator and Observer pattern event library


• Athena Negotiation - Framework agnostic content negotiation library


• device_detector - Shard for detect device by user agent string


• Exception Page - An exceptional exception page for Crystal web libraries and frameworks


• graphql - Type-safe GraphQL server implementation


• graphql-crystal - GraphQL implementation


• kemal-session - Session handler for Kemal


• mochi - Authentication shard inspired by Devise supporting: Authenticable, Confirmable, Invitable & more


• motion.cr - Object oriented frontend library for Amber


• multi-auth - Standardized multi-provider OAuth2 authentication (inspired by omniauth)


• praetorian - Minimalist authorization library inspired by Pundit


• Shield - Comprehensive security for Lucky framework


• shrine.cr - File Attachment toolkit for Crystal applications. Heavily inspired by Shrine for Ruby


• tourmaline - Telegram bot framework with an API loosely based on telegraf.js

Game Development

• CrSFML - Bindings to SFML multimedia/game library


• crystal-chipmunk - Bindings to Chipmunk, a fast and lightweight 2D game physics library


• crystal-imgui-sfml - Bindings to integrate Dear ImGui into an SFML project


• entitas.cr - A Entity Component System Framework for Crystal

GUI Development

• crystal-imgui - Bindings to Dear ImGui, an immediate-mode graphical UI library


• Iu - UI framework based on the Fusion/libui.cr library, with custom elements and modified bindings from hedron-crystal/hedron

HTML Builders

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

HTML/XML Parsing

• docx_cr_converter - parse DOCX Word


• gumbo-crystal - Bindings for Gumbo, an HTML5 parsing library made by Google


• myhtml - Fast HTML5 Parser that includes CSS selectors

HTTP

• Cable - An ActionCable "port" to Crystal, framework agnostic, 100% compatible with the ActionCable JS Client


• cossack - Simple flexible HTTP client


• crest - Simple HTTP and REST client, inspired by the Ruby's RestClient gem


• crul - Command line HTTP client


• digest-auth - Digest authentication


• halite - Crystal HTTP Requests with a chainable REST API, built-in sessions and loggers


• http-multiserver.cr - Mounting multiple servers via routes (a.k.a. URL mapping)


• http-params-serializable - HTTP params (de)serialization, applicable to URL queries and URL-encoded forms


• http-protection - Protection against typical web attacks


• http2 - HTTP/2 Protocol Implementation


• HTTP::Client - HTTP client (Crystal stdlib)


• HTTP::Server - HTTP server (Crystal stdlib)


• HTTP::WebSocket - HTTP WebSocket client (Crystal stdlib)


• link-header - HTTP Link Header Parser


• ntlm - NTLM authentication


• proxy-fetcher.cr - Proxy lists fetching & validating library


• sse.cr - Server-Sent Events client

Image processing

• celestine - Create SVG images using a DSL


• stumpy_png - Read and write PNG images

Implementations/Compilers

• charly - Charly Programming Language


• cltk - A crystal port of the Ruby Language Toolkit


• crisp - Lisp dialect implemented with Crystal


• LinCAS-lang - A programming language for scientific computation


• mint-lang - A refreshing programming language for the front-end web


• myst-lang - A practical, dynamic language designed to be written and understood as easily and efficiently as possible


• runic-lang - In-design toy language

Internationalization

• crystal-i18n - An internationalization library inspired by Ruby-I18n


• i18n.cr - Internationalization shard


• Lens - A multiformat internationalization (i18n) shard for Crystal. Supports Gettext, Ruby YAML, etc.

Logging and monitoring

• crafana - A Grafana library to help autogenerate dashboards


• Log - logging utility (Crystal stdlib)


• statsd.cr - Statsd client library

Machine Learning

• ai4cr - Artificial Intelligence (based on https://github.com/SergioFierens/ai4r)


• Cadmium - NLP library based heavily on natural


• crystal-fann - FANN (Fast Artifical Neural Network) binding


• mxnet.cr - Bindings for MXNet


• shainet - SHAInet (Neural Network in pure crystal)

Markdown/Text Processors

• markd - Yet another markdown parser built for speed, Compliant to CommonMark specification

Misc

• aasm.cr - Easy to use finite state machine for Crystal classes


• any_hash.cr - Recursive Hash with better JSON::Any included


• anyolite - Full mruby interpreter with simple bindings, allowing for easy scripting support in projects


• burocracia.cr - burocracia.cr the dependecyless shard to validate, generate and format Brazilian burocracias such as CPF, CNPJ and CEP


• callbacks - Expressive callbacks module


• circuit_breaker - Implementation of the circuit breaker pattern


• CrSignals - Signals/slots notification library


• crystal-binary_parser - Binary parser


• crystal-web-framework-stars - Web frameworks for Crystal, most starred on Github


• crz - Functional programming library


• emoji.cr - Emoji library


• gphoto2-web.cr - Web API for libgphoto2


• immutable - Implementation of thread-safe, persistent, immutable collections


• iterm2 - Display images within the terminal using the ITerm2 Inline Images Protocol


• monads - Monad implementation


• pinger - Ping IP addresses and DNS entries without requiring sudo


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


• retriable.cr - Simple DSL to retry failed code blocks


• serf-handler.cr - Framework for building Serf handlers, with a suite of useful builtin capabilities


• simple_retry - Simple tool for retrying failed code blocks


• sslscan.cr - Crystal shard wrapping the rbsec/sslscan utility


• version_tools - Version-dependent behaviour, specified at compile-time


• wafalyzer - Web Application Firewall (WAF) Detector - shard + cli


• zaru_crystal - Filename sanitization

Network Protocols

• amqp-client.cr - AMQP 0-9.1, a messaging protocol, implemented by eg. RabbitMQ


• connect-proxy - Connect method style of HTTP tunnelling / HTTP proxy


• cr-xmpp - XMPP/Jabber Library


• Crirc - IRC protocol implementation (Client, Server, Bots)


• crystal-bacnet - BACnet protocol implementation with BACnet/IP client


• crystal-dns - DNS protocol implementation and resolver


• crystal-json-socket - JSON-socket client & server implementation. Inspired by and compatible with node-json-socket and ruby-json-socket


• crystal-mqtt - A MQTT client


• crystal-snmp - An SNMP implementation with version 1, 2c and 3 support


• fast_irc.cr - Fast IRC parser/generator


• jwt - Implementation of JWT (JSON Web Token)


• mDNS - DNS Service Discovery and multicast DNS


• msgpack-crystal - MessagePack library


• OAuth - OAuth consumer (Crystal stdlib)


• OAuth2 - OAuth2 client (Crystal stdlib)


• OpenSSL - bindings to libssl (Crystal stdlib)


• simple_rpc - RPC Server and Client for Crystal. Implements msgpack-rpc protocol


• stomp - STOMP protocol


• telnet.cr - Telnet protocol


• transfer_more - Clone of transfer.sh to uploads files

Networking

• ipaddress.cr - Library to handle IPv4 and IPv6 addresses

ORM/ODM Extensions

• avram - A database wrapper for reading, writing, and migrating Postgres databases


• clear - ORM specialized to PostgreSQL only but with advanced features


• crecto - Database wrapper, based on Ecto


• granite - ORM for Postgres, Mysql, Sqlite


• jennifer.cr - Active Record pattern implementation with flexible query chainable builder and migration system


• onyx-sql - DB-agnostic SQL ORM with beautiful DSL and type-safe Query builder


• rethinkdb-orm - ORM for RethinkDB / RebirthDB

Package Management

• shards - Dependency manager for the Crystal

Processes and Threads

• await_async - Add keywords await & async in Crystal Lang


• neph - A modern command line job processor that can execute jobs concurrently


• promise - A Promise implementation with type inference


• werk - Dead simple task runner with concurrent support, ideal for local CI

Project Generators

• crystal_lib - Automatic binding generator for native libraries


• fez - A Kemal application generator


• libgen - Automatic bindings generator configured using JSON/YAML files

Queues and Messaging

• mosquito - Redis backed periodic and ad hoc job processing


• NATS.io - NATS client


• sidekiq.cr - Simple, efficient job processing

Routing

• orion - A minimal, rails-esque routing library


• router.cr - Minimum but powerful http router for HTTP::Server

Scheduling

• crystime - Advanced time, calendar, schedule, and remind library


• schedule.cr - Run periodic tasks


• tasker - A high precision scheduler including timezone aware cron jobs

Science and Data analysis

• alea - Repeatable sampling, CDF and other utilities to work with probability distributions


• ishi - Graph plotting package with a small API and sensible defaults powered by gnuplot


• linalg - Linear algebra library inspired by MATLAB and SciPy.linalg


• num.cr - Numerical computing library supporting N-Dimensional data


• predict.cr - Satellite prediction library using the sgp4 model


• quartz - Modeling and simulation framework

Search

• hermes - Data Mapper pattern implementation for ElastiSearch


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

Serverless Computing

• crystal_openfaas - Template to enable crystal as first class citizens in OpenFaaS


• FaaStRuby - Serverless Software Development Platform for Ruby and Crystal


• secrets-env - Extends ENV module to read values injected by docker / kubernetes secrets and other orchestration tools

System

• baked_file_system - Virtual file system implementation


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

Task management

• cake - Production-ready Make-like utility tool


• sam - Another one Rake-like task manager with namespacing and arguments system

Template Engine

• crinja - An implementation of the Jinja2 template engine


• crustache - {{Mustache}} for Crystal


• ECR (Embedded Crystal) - compile time template language which uses plain crystal expressions (Crystal stdlib)


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


• Kilt - Abstraction layer for template engines


• Slang - Lightweight, terse, templating language inspired by Ruby's Slim


• teeplate - A library for rendering multiple template files


• Water - A library for writing HTML in plain Crystal

Testing

• Athena Spec - Common/helpful Spec compliant testing utilities


• crotest - A tiny and simple test framework


• crytic - Mutation testing framework


• LuckyFlow - Automated browser tests similar to Capybara


• mass-spec - Web API testing library


• microtest - Small opinionated testing library focusing on power asserts


• minitest.cr - Library for unit tests and assertions


• mocks.cr - Mocking library for Crystal


• Spec - spec framework (Crystal stdlib)


• spectator - Feature rich spec framework that uses the modern expect syntax


• timecop.cr - Library for mocking with Time.now. Inspired by the timecop ruby gem


• vcr - A HTTP capture and replay implementation for crystal


• webdriver_pump - Page Object library. Inspired by Ruby's WatirPump


• webmock.cr - Library for stubbing HTTP::Client requests

Third-party APIs

• aws-signer.cr - This library signs your HTTP requests using AWS v4


• awscr-s3 - AWS S3 interface


• awscr-signer - Sign HTTP::Request objects and generate presigned post forms


• crystal-consul - Consul API client


• crystal-darksky - Wrapper for the Dark Sky API


• crystal-swapi - Star Wars API (SWAPI) wrapper


• crystal_slack - A tool that parses Slack slash commands or send incoming web hooks


• GDAX - GDAX REST and WebSocket API Wrapper with request signing


• gitlab.cr - GitLab API wrapper


• google - Google API wrapper


• host_meta - A Web Host Metadata (https://tools.ietf.org/html/rfc6415) client


• kube-client.cr - Kubernetes API Client


• mixpanel-crystal - A library for sending events to Mixpanel


• mollie.cr - Mollie Payments API wrapper (Creditcard, PayPal, Apple Pay, Sofort, Klarna, ...)


• office365 - Microsoft Graph API wrapper


• pinboard.cr - Pinboard API


• raven.cr - Raven is a client for Sentry


• stripe.cr - Stripe api wrapper


• tmdb.cr - The Movie DB (TMDb) api wrapper


• twitter-crystal - A library to access the Twitter API


• web_finger - A WebFinger (https://tools.ietf.org/html/rfc7033) client


• ynab.cr - A library to interact with your YNAB data

Validation

• accord - Shareable validation library for Crystal Objects


• Athena Validator - Robust & flexible validation framework


• validations - Validations mixin


• validator - Data check and validation

Web Frameworks

• amber - Open source efficient and cohesive web application framework


• Athena - A web framework comprised of reusable, independent components


• grip - The microframework for writing powerful web applications


• kemal - Lightning Fast, Super Simple web framework. Inspired by Sinatra


• lucky - Catch bugs early, forget about most performance issues, and spend more time on code instead of debugging and writing tests


• runcobo - An api framework with simple, intuitive and consistent DSL, using jbuilder to render json


• Shivneri - Component based MVC web framework for crystal targeting good code structures, modularity & performance


• spider-gazelle - A Rails esque web framework with a focus on speed and extensibility

Community

• Chicago Crystal Podcast


• Chicago Crystal YouTube


• Crystal weekly newsletters


• Gitter


• Google Group


• IRC - #crystal-lang on Freenode


• Metaruby - Crystal Forum on Metaruby


• Reddit


• Stackoverflow

Unofficial

• Chinese-speaking Telegram Group - 来吧！TG 中文圈的朋友们！


• Crystal Programming Discord Server - Unofficial Discord server dedicated to the Crystal Programming Language


• Portuguese-speaking Telegram Group - Bem vindos ao Crystal Brasil!


• Russian-speaking Telegram Group - Добро пожаловать, товарищ!

Resources

• Crystal for Rubyists - Free book to bootstrap your Crystal journey


• Crystal Mastery - Screencasts for learning Crystal


• crystal-koans - Learn Crystal by writing unit tests


• crystal-lang.org - Official language site


• devdocs.io - API Documentation Browser with Crystal support


• getgood.at - Learn Crystal in a Day


• Programming Crystal - PragProg book to start your Crystal journey

Official Documentation Translations

• br.crystal-lang.org - Brazilian


• ja.crystal-lang.org - Japanese


• kr.crystal-lang.org - Korean


• ru.crystal-lang.org - Russian


• tw.crystal-lang.org - Chinese Traditional

Services and Apps

• carc.in - A web service that runs your code and displays the result


• Crank - A Procfile-based application manager (like Foreman)


• cry - Ability to execute crystal code in a fashion similar to Ruby's pry edit


• Crystal [ANN] - Announce new project, blog post, version update or any other Crystal work


• crystalshards.herokuapp.com, crystalshards.xyz - Web services that list all available Crystal shards


• Crystular - Regular expression tester


• DeBot - IRC bot written in Crystal


• icr - Interactive console for Crystal (like IRB for Ruby)


• Invidious - Invidious is an alternative front-end to YouTube


• mpngin - A URL shortener with simple stats


• quicktype - Generate models and serializers from JSON, JSON Schema, GraphQL, and TypeScript


• shards.info - Web service that lists all repositories on GitHub that have Crystal code in them. The sources are available on GitHub

Tools

• ast_helper - Helper tool to debug parser and formatter


• crystal-base - CentOS base docker image for Crystal development


• crystal-dash-docset - Dash docset generator


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

DevOps

• ansible-crystal - Ansible playbook for installing crystal


• DPPM - An easy, universal way to install and manage applications as packages (mostly Linux)

Editor Plugins

• Acme:


• acmecrystal - Reformats crystal code in acme


• Atom


• crystal-tools - Enables built in tools in Crystal compiler


• language-crystal-actual - Crystal language support in Atom


• Emacs


• crystal-mode - Crystal language support for Emacs (crystal-lang-tools/emacs-crystal-mode)


• Geany


• geany-crystal - Crystal support for the Geany editor


• Spacemacs


• crystal-spacemacs-layer - Spacemacs contribution layer for Crystal


• Sublime


• sublime-crystal - Crystal syntax highlighting for sublime Text


• TextMate


• Crystal.tmbundle - Crystal syntax highlighting, compile, format command, snippets


• Vim


• vim-crystal - Vim filetype support for Crystal


• vim-slang - Vim filetype support for Slang Templating Engine


• Visual Studio Code


• vscode-crystal-lang - Formatter, linter and syntax highlighting for cr and ecr files

LSP Language Server Protocol Implementations

• crystalline - Crystalline is an implementation of the Language Server Protocol written in and for the Crystal Language


• scry - Code analysis server for Crystal implementing the Language Server Protocol

Shell plugins

• crun - Crystal Run : shebang wrapper for Crystal


• crystal-zsh - .oh-my-zsh plugin