AFTER is a configurable test engine written in Ruby. Libraries can be added to facilitate testing against any application type. It also allows for test scripts to be written in any format provided there is an associated script reader for that format.
RInject is a tool for automated testing of web applications and services. It can be used to test HTTP(S) interfaces for service-level monitoring. Compared to WebInject, RInject has a more powerful verification- and parsing-engine.
Test case management plugin for Redmine The project has moved to BitBucket: https://bitbucket.org/bugzinga/redcase
Tensor is a tool written in Ruby that helps provide an estimate on the cost of change on test source code based on a radical change in design on production source code, especially around branch execution code. It works with the JRuby interpreter also on
Web Recorder is a testing tool for web-based applications. The recording tool records scripts using Internet Explorer's COM interface and saves them in XML. You can insert test points into the script, then play it back in IE.
Ruby based test harness to aid in black box test automation, build server automation or any other general automations.