Trac
Managing projects with Trac »
Sounds like Trac, with its Subversion integration, is becoming an emerging standard tool for starting and tracking open source projects.
Trac Hacks »
Nevermind the wiki, its Subversion browser (esp. the changesets) and ticketing system rock
Table of contents macro for Trac wiki software »
Requires patching the code to get anchors inserted into the wiki pages themselves
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