Robby Ingebretsen published the source code of his incredibly useful (and beautiful!) Kaxaml on CodePlex. I often prefer Kaxaml over Visual Studio because it combines a bunch of really smart features with a very nice UI that just makes it a pleasure to work with. I’m definitely looking forward to have a peek at its internals 🙂

CodePlex project site: http://www.codeplex.com/Kaxaml
Official Kaxaml download site: http://www.kaxaml.com