OOCSS isn’t really a framework … but a way of writing scalable, sane, maintainable CSS
http://www.sitepoint.com/blogs/2009/06/16/first-look-object-oriented-%20css/
Webunder is a creative web design and development studio using ExpressionEngine as a Content Management System
http://www.sitepoint.com/blogs/2009/06/16/first-look-object-oriented-%20css/