CSScaffold – Using PHP to Extend the Abilities of CSS
github.com
github.com
Thought I would open the discussion here - who actually likes the syntax used in these libraries? Personaly I'm not a fan of extending the language syntax for new features. Adding new features I like but at least try and stick to CSS's style.
(Comparison - http://github.com/stuartloxton/Mechanical-CSS/)
Knock yourself out!