Codrops is one of my favorite places to browse when I’m bored or looking for inspiration. They have some of the coolest and most complete demos I’ve come across for everything from interesting and modern menu systems to slideshow transitions. All of their demos are smooth and polished, and I always end up clicking and watching everything move over and over again for way too long.
Well, Codrops is now also home to one of the most well put together CSS references I’ve seen yet. It seems to include every property, @rule, function, data type, and psuedo-class in the spec, each complete with descriptions, examples and browser support references.