Ruby file uploads, take 3
Behaviour Driven Development framework for Ruby
RSpec: Behaviour Driven Development for Ruby
PDF generator (from HTML) plugin for Ruby on Rails
A very fast & simple Ruby web server
Thin - yet another web server
A Ruby Object Mapper for Mongo
MongoMapper
An open source social networking platform in Ruby on Rails
Webrat - Ruby Acceptance Testing for Web applications
Documentation for brynary/webrat (master)
Strategies for cleaning databases in Ruby. Can be used to ensure a clean state for testing.
database_cleaner | RubyGems.org | your community gem host
Sucker Punch is a Ruby asynchronous processing library using Celluloid, heavily influenced by Sidekiq and girl_friday.