mantis + scmbug (Score 1)

Our group evaluated a handful of workgroup tools: issue tracking, revision control, documentation. Trac was in the list, but it fell short on a number of points after we tried it for a simple project. We wanted SVN integration and liked Mantis, so we hooked in scmbug. It took a little tweaking to setup the 'products' in scmbug to meet our Mantis usage pattern, but it does the trick. Throw on your favorite wiki (mediawiki, twiki, moinmoin, etc.), and you are covered.