Versioncontrol_project is a project mainly written in PHP, it's free.
Drupal Version Control API Project integration module
$Id: README.txt,v 1.5 2008-01-11 04:44:01 jpetso Exp $
Version Control / Project Node Integration - Integrates project nodes (provided by the Project module) with version control systems supported by the Version Control API.
This module makes it possible for users with a VCS account to associate project nodes with repository locations and appoint co-maintainers for these projects, which enables commit access control based on project maintainership.
Version Control / Project Node Integration depends on the Version Control API and Project modules.
Jakob Petsovits
Some code in Version Control / Project Node Integration was taken from the CVS integration module on drupal.org, its authors deserve a lot of credits and may also hold copyright for parts of this module.
This module was originally created as part of Google Summer of Code 2007, so Google deserves some credits for making this possible. Thanks also to Derek Wright (dww) and Andy Kirkham (AjK) for mentoring the Summer of Code project.