EnterTrack

"EnterTrack is a web-based artifact tracking/management system written in PHP4. EnterTrack is derived from Issue-Tracker v4.0.1 (www.issue-tracker.com) and adds a number of features particularly useful to larger groups. EnterTrack provides large organizations with start-to-finish tracking of artifacts (artifacts can be problems, bugs, requests, projects, etc.), group collaboration for artifact management, and status reports for high-level performance metrics."

http://www.entertrack.org/