Rush is a project mainly written in JavaScript, it's free.
improved Ruby brush (and theme) for SyntaxHighlighter (http://alexgorbatchev.com/wiki/SyntaxHighlighter)
h2. Rush
I like the javascript SyntaxHighlighter written by Alex Gorbatchev (http://alexgorbatchev.com/wiki/SyntaxHighlighter) by I didn't care for the treatment of Ruby. I decided to write my own Ruby "brush" and a matching theme that is ruby-centric.