Obby

Obby Wiki documents , a free   and its core libraries. Gobby allows many people around the world to edit the same file at the same time, in real-time. The developers also manage the project via the wiki.

Apparently this was at http://darcs.0x539.de/trac/obby/cgi-bin/trac.cgi/wiki, but then moved to http://gobby.0x539.de/trac/wiki .