For some vendor-specific CSS research I’m doing, I’ve created an overview of vendor-prefixed CSS properties that are currently supported in the four most popular rendering engines. The overview also contains references to the specifications they’re part of (if any), non-prefixed versions in other browsers and some notes on special conditions of a property.
One thing I noticed when creating the overview, is the amount of non-standard properties in WebKit. Looks like they got some catching up to do in terms of documenting their features. If you have any feedback or corrections, feel free to post a comment or poke me on Twitter!