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.

UniRate-API/unirate-api-crystal

Official Crystal client for the UniRate API — free currency exchange rates, historical data, and VAT rates. Zero dependencies (Crystal stdlib).

crystal-ameba/ameba

A static code analysis tool for Crystal

dev-transparent/grpc

plambert/shell-auto_complete.cr

Opinionated CLI option parsing and shell autocompletion for Crystal

kojix2/deepl-cli

A fast and lightweight CLI for DeepL

jgaskins/stripe

Stripe API client for Crystal

openbohemians/jargon.cr

JSON Schema as CLI interface

weirdbricks/krikri

Fast Ansible-compatible automation in Crystal - no Python required

nogginly/tensomite.cr

A small pure-Crystal tensor maths runtime with a minimal native seam to BLAS and the GPU.

iyilang/iyi

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

azutoolkit/azu_cli

Azu CLI is a powerful, developer-friendly command-line tool designed to accelerate development with the Azu Toolkit framework

ch1c0t/tmux-repl

joeyrobert/experion

UCI chess engine in Crystal with an NNUE trained from scratch on CCRL games. Beats Fruit 2.1 and Crafty 25.2 in local matches.

chocolatemoo53/invidious-fork

GrottoPress/penny

Get up and running with Lucky framework and Shield

OrelSokolov/active_storage.cr

OrelSokolov/carat.cr

A better package manager for Crystal

OrelSokolov/crails

ch1c0t/crystal.pty