Crystal crystal-lang

Open-source Crystal projects categorized as crystal-lang

Top 23 Crystal crystal-lang Projects

  • Mango

    Mango is a self-hosted manga server and web reader

    Project mention: Best way to self-host ebooks? | /r/selfhosted | 2023-04-17

    I use mango ( for compressed images aka. ( cbz, cbr, cb7) and it works well for what I need.

  • hetzner-k3s

    A CLI tool to create and manage Kubernetes clusters in Hetzner Cloud using the lightweight distribution k3s by Rancher.

    Project mention: K3s on hetzner virtual hosts | /r/selfhosted | 2023-06-03

    There’s this cool GitHub project that helps automate a lot of the process for K3s on Hetzner:

  • Onboard AI

    Learn any GitHub repo in 59 seconds. Onboard AI learns any GitHub repo in minutes and lets you chat with it to locate functionality, understand different parts, and generate new code. Use it for free at

  • marten

    The pragmatic web framework. (by martenframework)

    Project mention: Marten 0.3 has been officially released! | /r/crystal_programming | 2023-06-19

    Check out the Marten GitHub repository

  • Cadmium

    Natural Language Processing (NLP) library for Crystal

  • marionette

    Selenium alternative for Crystal. Browser manipulation without the Java overhead.

    Project mention: marionette: A Selenium alternative written in Crystal | /r/crystal_programming | 2023-06-20
  • multi-auth

    Standardized multi-provider OAuth authentication

  • crysterm

    Console / terminal GUI toolkit for Crystal.

  • InfluxDB

    Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.

  • wasmer-crystal

    WebAssembly runtime for Crystal

    Project mention: Wasmer Crystal - A complete WebAssembly runtime for Crystal based on Wasmer | /r/crystal_programming | 2022-12-29
  • celestine

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

  • pluto

    A fast and convenient image processing library (by phenopolis)

    Project mention: pluto: A fast and convenient image processing library in Crystal | /r/crystal_programming | 2023-03-01
  • praetorian

    A minimalist Crystal authorization system inspired by

  • tallboy

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


    Motion is a framework for building reactive, real-time frontend UI components in your Amber application using pure Crystal that are reusable, testable & encapsulated.

  • redis

    Pure-Crystal Redis client, supporting clustering, RedisJSON, RediSearch, RedisGraph, and RedisTimeSeries (by jgaskins)

  • Fluence

    WYSIWYG wiki powered by Crystal, markdown, and Git

  • Jbuilder

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

  • Crystalizer

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

  • Crystar

    Crystal language Tar Module implements access to tar archives.

  • rosetta

    A blazing fast internationalization (i18n) library for Crystal with compile-time key lookup. (by wout)

  • Crystular

    Crystal regex tester


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


    Shard for the Gosu game library

  • validator

    :gem: Data validation module for Crystal lang

  • SonarQube

    Static code analysis for 29 languages.. Your projects are multi-language. So is SonarQube analysis. Find Bugs, Vulnerabilities, Security Hotspots, and Code Smells so you can release quality code every time. Get started analyzing your projects today for free.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-06-20.

Crystal crystal-lang related posts


What are some of the best open-source crystal-lang projects in Crystal? This list will help you:

Project Stars
1 Mango 1,567
2 hetzner-k3s 1,081
3 marten 332
4 Cadmium 198
5 marionette 173
6 multi-auth 112
7 crysterm 106
8 wasmer-crystal 87
9 celestine 86
10 pluto 59
11 praetorian 57
12 tallboy 50
13 50
14 redis 49
15 Fluence 45
16 Jbuilder 45
17 Crystalizer 39
18 Crystar 38
19 rosetta 35
20 Crystular 33
21 32
22 32
23 validator 28
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