A gem that makes writing ZPL easy!
Pure Ruby one-shot and periodic timers
Rails SQL Views project extracted from ActiveWarehouse
CITIER (Class Inheritance & Table Inheritance Embeddings for Rails) is a solution for simple Multiple Class Inheritance in Rails.
Sample application for a Facebook/Rails tutorial
JRuby swt gem
Ruby on Rails TextMate bundle [Learn it with PeepCode - http://peepcode.com/products/textmate-for-rails-2]
A Really Ruby Mail Library