soup.io-Plugin for rbot, possibly also extractable and usable without rbot
fast code profiler for Ruby
official ruby bindings for various EFL libraries from svn.enlightenment.org
"Simple library which makes it easy to add caching to all your external API calls."
This is the Ruby D-Bus tutorial. It aims to show you the features of Ruby D-Bus and as you read through the tutorial also how to use them.