What is Trac?

o An integrated system for managing software projects
o An enhanced wiki
o A flexible web-based issue tracker
o An interface to the Subversion revision control system

Reference

Edgewall Software: Trac
http://www.edgewall.com/trac/

via

discypus.jp - ソフト/開発ツール/Bug Tracking/trac
http://discypus.jp/wiki/?%A5%BD%A5%D5%A5%C8%2F%B3%AB%C8%AF%A5%C4%A1%BC%A5%EB%2FBug%20Tracking%2Ftrac