EventMachine: fast, simple event-processing library for Ruby programs

Actor-based concurrent object framework for Ruby

Goliath is a non-blocking Ruby web server framework

A modern, simple and very fast Mysql library for Ruby - binding to libmysql

EventMachine based WebSocket server

Fiber aware EventMachine clients and convenience classes

A library of neat Rails application templates.

a modular Ruby webserver interface | personal fork | PLEASE BRANCH/SEND PULL REQUESTS/FILE BUGS AT rack/rack

A plugin for Sinatra to provide a DSL extension for using Thin for asynchronous responses

Twitter realtime API client

The web application that runs https://contributors.rubyonrails.org

Makes middleware that ships with Rack bullet-proof for async responses.

CAS Server

Rails plugin to be used with ModPorter

A multiplayer websocket based bomberman clone

RSpec-2 support for cramp - a fully asynchronous real-time web application framework in Ruby

REST for your work (queues)

Startup weekend Taipei 2011 project

The Ruby Programming Language

"Twitter clone" using sharded MySQL from Cramp