Lately I have been experimenting with the YUI Library CSS Tools and Blueprint. Both are an open source CSS framework, which as Blueprint so gracefully puts it “gives you a solid CSS foundation to build your project on top of, with an easy-to-use grid and sensible typography…”. After experimenting with both, I have continued to lean towards YUI’s framework. It seems to be a little more matured and well-known, so I will focus on YUI.