Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns.

Rack middleware for blocking & throttling

Sequel: The Database Toolkit for Ruby

Ruby ♥︎ JavaScript

Ruby: parallel processing made simple and fast

[DISCONTINUED ] Attributes on Steroids for Plain Old Ruby Objects

Role management library with resource scoping

A high-performance web server for Ruby, supporting HTTP/1, HTTP/2 and TLS.

Rails application preloader

Ruby algorithms and data structures. C extensions

Sucker Punch is a Ruby asynchronous processing library using concurrent-ruby, heavily influenced by Sidekiq and girl_friday.

An awesome asynchronous event-driven reactor for Ruby.

Active Record, improved. Live again :)

A Ruby job queue that uses PostgreSQL's advisory locks for speed and reliability.

A markdown based documentation system for style guides.

faster, friendlier Docker on OS X. Deprecated.

A transparent service discovery framework for connecting an SOA

IdentityCache is a blob level caching solution to plug into Active Record. Don't #find, #fetch!

Efficient, Immutable, Thread-Safe Collection classes for Ruby

Generic connection pooling for Ruby

A reliable and robust messaging bus for Ruby and Rack

Compose your business logic into commands that sanitize and validate input.

Simple, efficient worker queue for Ruby & PostgreSQL.

Terminal Keynote - A hack for terminal-based talks

A toolkit for building Null Object classes in Ruby

Restarts an app when the filesystem changes. Uses growl and FSEventStream if on OS X.

Date and time formatting for humans.

A service registration daemon that performs health checks; companion to airbnb/synapse

Pure Ruby implementation of HTTP/2 protocol

Automatically restart Unicorn workers based on 1) max number of requests and 2) max memory