Active Record backup is a Rails plugin which lets you backup your database schema and content in a schema.rb file and fixtures.
Life On The Edge With Merb, DataMapper & RSpec
My own base_app to start project with Mongoid/devise/omniauth/cancan/steak
An little example of rails application for CapGemini presentation
XMPP/Jabber Library and DSL for Ruby written on EventMachine and Nokogiri.
Use FSEvent (Mac OS X 10.5 or higher) instead of filesystem polling.
Bob the Builder will build your codes