Codendi is the collaborative development platform offered by Xerox. From only one interface, it gathers, all the needed tools for software development teams: management and versioning of code, bugs, requirements, documents, reporting, tests...
FusionForge has tools to help your team collaborate, like message forums and mailing lists; tools to create and control access to Source Code Management repositories like CVS and Subversion. FusionForge automatically creates a repository and controls access to it depending on the role settings of the project.
GForge is an Open Source collaborative software development tool, which allows you to organize and manage any number of software development projects. It's perfect for managing large teams of software engineers and/or engineers scattered among multiple locations.