Ruby-Supreme.tmbundle is a project mainly written in ..., it's free.
A TextMate bundle I use w/ my Ruby stuff. Full of magic.
To install:
mkdir -p ~/Library/Application\ Support/TextMate/Bundles cd ~/Library/Application\ Support/TextMate/Bundles git clone git://github.com/macournoyer/Ruby-Supreme.tmbundle.git "Ruby Supreme.tmbundle" osascript -e 'tell app "TextMate" to reload bundles'