If you're looking for an easy to use open source project management tool to manage the workflow of your software development team, then take a look at Retrospectiva. It's powerful software on its own that becomes better when you add on modules to make it even more functional and flexible.
Retrospectiva is designed with an eye toward engineering teams that need a tool to carry them through the entire development life cycle. It tracks issues and tickets, manages goals and milestones, and offers code review and revision management features as well. Retrospectiva also includes support for Subversion and Git.
Users can easily add additional modules to the Web-based project management tool, including a blog, wiki, or AgilePM. Retrospectiva has full RSS support and an XML-REST API.
The next time your development team tackles a big project, check out Retrospectiva to keep everyone on the same page.