Allura Wiki
About Allura
Allura is an open source implementation of a software "forge", a web site that manages source code repositories, bug reports, discussions, mailing lists, wiki pages, blogs and more for any number of individual projects.
SourceForge.net is running an instance of Allura (aka New Forge, or Forge 2.0); and Allura itself is a project managed there:
https://sourceforge.net/p/allura/
The source for Allura is available there from a Git repo under the Apache License, Version 2.0.
http://www.apache.org/licenses/LICENSE-2.0
Allura is written in Python and leverages a great many existing Python packages (see requirements.txt and friends). It comes with tests which we run with nose (see http://somethingaboutorange.com/mrl/projects/nose/1.0.0/). It is extensible in several ways, most importantly via the notion of "tools" based on allura.Application; but also with themes, authentication, and various other pluggable-APIs.
Contributing to the Allura Project
Allura is an effort for the community: an open source platform for sharing development. We think it should be of the community as well. We want to encourage community involvement in development, testing and design. We do that with a public git repo, a bug tracker, a discussion list and an IRC channel.