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

Rails application preloader

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

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.

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

An awesome asynchronous event-driven reactor for Ruby.

A markdown based documentation system for style guides.

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

A reliable and robust messaging bus for Ruby and Rack

Generic connection pooling for Ruby

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

Flexible type system for Ruby with coercions and constraints

Agent is an attempt at modelling Go-like concurrency, in Ruby