Go faster, off the Rails - Benchmarks for your whole Rails app
Database based asynchronous priority queue system -- Extracted from Shopify
Ruby on Rails
Flexible authentication solution for Rails with Warden.
AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, MongoMapper)
Identify app models with a URI
ActiveRecord backend integration for DelayedJob 3.0+
RSpec runner and formatters
Appcelerator Titanium Mobile
Enhanced Rails Scaffold Generator
Devise << Facebook Connect
Silverpop Engage and Transact Ruby API -- Extracted from ShoeDazzle.com To install drop in your project's vendor/plugin folder. Built on Rails 2.1.0. Requires hpricot, net/http, net/ftp, and uri.
Let's you connect your laptop to the iPhone to surf the web.
Find likely mass assignment vulnerabilities
Inspection of mass-assignment characteristics of ActiveRecord models
Rack for JRuby and Java appservers
A port of Merb's run_later functionality to thread-safe Rails (>= 2.2).
Threadsafe after_commit callbacks for ActiveRecord
ActiveRecord adapter for JDBC and JRuby<br>Alternate clone at git://kenai.com/activerecord-jdbc~main