Ruby: 2 CPUs = 2x Testing Speed for RSpec, Test::Unit and Cucumber

Ruby production code coverage collection and reporting (line of code usage)

Rails plugin that logs/displays a backtrace of all SQL queries executed by Active Record

High-level image processing wrapper for libvips and ImageMagick/GraphicsMagick

Full text searching Linux man pages with Elasticsearch 🐧

RUBY UML class diagram generator with XMI and DOT output.