Trac is one of the best tools out there to manage your projects. It integrates an issue-tracking system, a wiki, a code browser and the three of them easily link to each other. At WebFaction we use it for all of our projects and we love it.
Trac works hand in hand with the version control system that you use for your code. Until recently our one-click installer only supported Subversion as the version control system for Trac but we’ve just added support for Git.
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