Like totally awesome testing framework. Did I mention "totally" already?

Easily create callbacks for automated testing with tork

Treadmill is a performance testing tool

Simple rake tasks to open "Reverse" SSH tunnels for testing OAuth and other external APIs

A gem for testing ticket updates

Uncool is a unit testing coverage tool that monitors tests recording all the methods covered for the tarageted namespaces.

Distributed load testing in Ruby using your own cloud

Gem for testing above the fold render on the first tcp round trip.