RSpec-esque matchers for Test::Unit

Dave Thomas' proof of concept test library

A super tight library to add contexts to tests.

Generates common user authentication code for Rails/Merb, with a full test/unit and rspec suite and optional Acts as State Machine support built-in.

Resources for rspec developers/contributors

Behaviour Driven Development framework for Ruby

DataMapper - Core

Makes tests easy on the fingers and the eyes

A reimplementation of RSpec's story framework, based on Treetop.

RSpec extensions for various UI architectures

RR (Double Ruby) is a test double framework that features a rich selection of double techniques and a terse syntax.

Ruby on Rails

Rails plugin to conveniently handle multiple models in a single form.

Awesome gem for modeling your domain and storing it in mongo