Trac

Trac is an enhanced wiki and issue tracking system for software development projects. Trac uses a minimalistic approach to web-based software project management. Its mission is to help developers write great software while staying out of the way. Trac is designed to impose as little as possible on a team's established development process and policies.

Trac has a built-in wiki system which can be used for organizing knowledge and information in a very flexible way by creating pages containing an easy to learn textual markup. The wiki markup is used throughout Trac, so not only in wiki pages, but also in ticket description and comments, version control log messages, milestone descriptions, report descriptions and even in third-party extensions. It allows for formatted text and hyperlinks in and between all Trac modules.