Trac is a minimalistic web-based software project management and bug/issue tracker. It provides an interface to the Subversion revision control systems, an integrated wiki, flexible issue tracking and convenient report facilities.
Trac allows wiki markup in issue descriptions and commit messages, creating links and useful structure between bugs, tasks, changesets, files and wiki pages. A timeline view presents all project events in chronological order, making tracking progress or getting an overview of a project easy.
Trac is free software, developed and maintained by Edgewall Software.
Trac Website:
http://trac.edgewall.com/