Trac is a web application which provides issue tracking, timelines and Wiki with Subversion integration. Trac is written in Python and can be either run as a cgi program (any web server) or within mod_python (Apache).

The Subversion and Trac combination is proving to be very popular.

The current version (0.8.2) only supports a single project per repository and this is the main limitation which is preventing truly widespread use among Subversion users.

However, Trac shows great promise to be a simple, elegant and yet powerful way of tracking project progress and logging tickets.

Project progress is tracked using milestones, tickets are assigned to a given milestone and progress is guaged by the number of those tickets which have been closed.

Trac also includes an excellent Subversion repository browser.