Upyun storage engine for paperclip
A collection of useful .gitignore templates
RailsAdmin is a Rails 3 engine that provides an easy-to-use interface for managing your data
The best Rails 3.1 forum engine. Ever.
A base theme for the forem forum system.
A jQuery plugin that turns regular select boxes into Quicksilver-like, flex-matching, incremental...
A Gem to add Follow functionality for models
Database Sharding for ActiveRecord