Trac: Wiki software for Project Management

Trac is an enhanced wiki and issue tracking system for software development projects. Trac uses a minimalistic approach to web-based software project management. Trac allows wiki markup in issue descriptions and commit messages, to create links and seamless references between bugs, tasks, changesets, files and wiki pages. A timeline shows all project events in order, making getting an overview of the project and tracking progress very easy.

Trac is open source software that requires Python.
Trac: Wiki software for Project Management