Crystal

praetorianilanusse/praetorian

A minimalist Crystal authorization system inspired by Pundit, offering lightweight, dependency-less policy-based access control.

vcrspoved/vcr.cr

A VCR port for Crystal that records HTTP interactions during tests and replays them for faster, deterministic test runs.

Rosettawout/rosetta

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

Shieldgrottopress/shield

A comprehensive Identity & Access Management solution for the Lucky framework with robust authentication and authorization features.

taskerspider-gazelle/tasker

A high-precision scheduler for Crystal that enables scheduling tasks, CRON jobs, and asynchronous pipelines.

crystal-koansilmanzo/crystal-koans

An educational unit test suite for learning the Crystal programming language through test-driven exercises.

aasm.crveelenga/aasm.cr

A finite state machine implementation for Crystal classes that enables objects to act as state machines with defined states and transitions.

LuckyFlowluckyframework/lucky_flow

A Crystal library for automated browser testing of web applications, similar to Ruby's Capybara.

mocks.crwaterlink/mocks.cr

A general-purpose mocking library for Crystal with support for partial doubles, instance doubles, and class doubles.

cridej8r/cride

A lightweight CLI text editor and IDE written in Crystal, designed for speed and customizability.

emoji.crveelenga/emoji.cr

A Crystal library for converting emoji shortcodes to Unicode characters and sanitizing emoji from strings.

linalgkonovod/linalg

A Crystal linear algebra library providing a high-level interface to LAPACK routines for matrix operations.

motion.crawcrotwell/motion.cr

A framework for building reactive, real-time frontend UI components in Amber applications using pure Crystal.

clang.crcrystal-lang/clang.cr

Libclang bindings for Crystal with an automatic C bindings generator.

runcoboruncobo/runcobo

A Crystal-based API framework with type-safe parameters and elegant JSON/HTML serialization.

hashids.crsplattael/hashids.cr

A Crystal shard for generating YouTube-like hashes from numbers to obfuscate database IDs.

Crankarktisklada/crank

A Crystal language port of Foreman for managing Procfile-based applications.

fezjwoertink/fez

A Kemal application generator for Crystal that scaffolds opinionated web apps and APIs with templates.

ssh2.crspider-gazelle/ssh2.cr

A Crystal language binding for libssh2 that provides SSH, SCP, and SFTP client functionality.

sodium.crdidactic-drunk/sodium.cr

Crystal language bindings for the libsodium cryptographic library, providing a safe and easy-to-use API.

cachecrystal-cache/cache

A Crystal key/value store with configurable expiration for caching serializable objects.

stripe.crconfact/stripe.cr

A Crystal language wrapper for the Stripe API, following Ruby's method and class structure.

secp256k1.crq9f/secp256k1.cr

A native Crystal library implementing the Secp256k1 elliptic curve for cryptographic operations used in Bitcoin, Ethereum, and Polkadot.

concurrent.crdidactic-drunk/concurrent.cr

A Crystal library providing modern concurrency tools like parallel enumerables, channels, and synchronization primitives.

BinDataspider-gazelle/bindata

A declarative binary data parsing and serialization library for the Crystal programming language.

fzyhugopl/fzy

A Crystal port of the Fzy fuzzy finder algorithm for fast and accurate string matching.

crunVal/crun

A shebang wrapper for Crystal that allows running Crystal source files directly like scripts.

monadsalex-lairan/monads

A Crystal library providing functional programming monads like Maybe, Either, List, Try, and Task for safer, composable error handling and data manipulation.

Crystarnaqvis/crystar

A pure Crystal shard for reading and writing tar archives, supporting USTAR, PAX, and GNU formats.

NATS.ionats-io/nats.cr

A Crystal client library for connecting to NATS messaging servers.

crisprhysd/Crisp

A Lisp dialect based on mal and implemented with Crystal, serving as a toy box for dynamic language ideas.

ishitoddsundsted/ishi

A Crystal library for creating graphs with a minimal API and sensible defaults, powered by gnuplot.

retriable.crSija/retriable.cr

A Crystal shard providing a simple DSL to retry failed code blocks with configurable exponential backoff.

ipaddress.crSija/ipaddress.cr

A Crystal library for handling IPv4 and IPv6 addresses with a modern, object-oriented interface.

promisespider-gazelle/promise

A fully typed promise implementation for Crystal Lang, enabling asynchronous operations with type safety.

crystal-chipmunkoprypin/crystal-chipmunk

Crystal language bindings for Chipmunk, a fast and lightweight 2D rigid body physics library.