leoc/calibre-hub

Thin API, change events and web UI on top of calibre-server

weirdbricks/krikri

Fast Ansible-compatible automation in Crystal - no Python required

ShiningRay/celerite

A high-performance, Bundler-compatible Ruby dependency manager written in Crystal.

iyilang/iyi

A friendly, fast programming language for people and their agents.

owasp-noir/noir

Hunt every Endpoint in your code, expose Shadow APIs, map the Attack Surface.

pedrohvsouza/braxy

pedrohvsouza/saci

A Web framework for Crystal inspired on Ruby On Rails

zane-lang/zane

OrelSokolov/lua5.cr

Crystal interpreter for Lua to rich luabind functionality in Crystal

crystal-lang/crystal

The Crystal Programming Language

robdavid/nixos-safe-gc

Collect garbage in NixOS without removing the running kernel

vitobotta/hetzner-k3s

The easiest and fastest way to create production-ready Kubernetes clusters on Hetzner Cloud

rjnienaber/amazonite

An unofficial SDK supporting popular AWS APIs.

sdogruyol/gcry

Crystal’s GC, written in Crystal.

Crystal-Matter/matter

A complete Crystal lang implementation of the Matter protocol specification (https://buildwithmatter.com). Includes full support for controller, device, commissioning, secure communications, device types, and cluster definitions.

caramelizedev/caramel

An early Crystal framework and local development environment for complete browser applications

exercism/crystal

Exercism exercises in Crystal.

mohd-akram/plic

Website for sending one-time secret messages securely.

sethuiyer/semrember

Compressed associative memory in Crystal: text → a learned label matrix read with one matvec. Exact key-value operations, plus a Redis-shaped HTTP/JSON API whose semantic layer returns ranked candidates and confidence rather than a bare answer. One static binary, no runtime dependencies.

stevegeek/marten-cdn-cache

Marten web frameword rule-based Cache-Control middleware for CDN caching (public / immutable-asset / private policies); strips cookies on cacheable rules.