WikiFolders provides the ability to annotate the contents of your folders in OS X using a straightforward, wiki-style markup language. Annotated folders are viewable by anyone, even when the WikiFolders software isn't installed.2 weekly downloads
Glogo is a software project to develop a crossplatform, standards compliant 3D desktop GUI and multiuser networking environment. If you're familliar with William Gibson's Neuromancer or Neal Stephenson's Snow Crash, then you get it. Coders needed!