I've used moinmoin in the past and it worked very well. http://moinmo.in/ http://moinmo.in/ EDIT: just wanted to add I've also used Trac http://trac.edgewall.

I've used moinmoin in the past and it worked very well. http://moinmo.in/ http://moinmo.in/ EDIT: just wanted to add I've also used Trac http://trac.edgewall.org/ http://trac.edgewall.org/