Good for testing dependencies of a gem and/or different gem version combinations

Does versioning, releasing and testing of rubygems with git

Bidirectional automatic mapping for the .Net platform, with strong verification and testing tools.

Some helpers for golden master testing in Ruby.

Includes script for gorilla test integration testing

Classes and functions to support feature testing.

UI testing/screenshot diffing tool

QAT-Web-Video is a screen recorder for Web testing evidences, with support for various browsers and webdrivers.

testing gem

Hansel is a pure ruby driver for httperf for automated load and performance testing. It will load a job queue file, in a yaml format, run httperf with each job.

JSON-RPC Server Specification Compatibility Testing

Semantic expectation helpers for JSON API testing using Airborne and RSpec.

JavaScript BDD Testing Framework

Just testing jeweler and gemcutter

Webrat. Ruby Acceptance Testing for Web applications

Pluoa Mapper is a lib to manage easily elements mapped inside pages and help to keep you pages objects cleaner and organized. Used to work with Testing Automation

The exiled should_be_restful macro from the shoulda testing library

Kloutbg - Fork of Jason Torres and updated to recent Klout API. No testing. Now using httparty like Eddy Parris.

Great for integration testing.

lavanda ruby testing utilities for multimachines