documentr is a Web-based tool for editing and presenting software documentation. It allows you to easily maintain documentation for multiple products and product branches. Edits can easily be copied between branches, with merge conflicts being handled gracefully. It uses Markdown as its markup language, along with some extensions, and has a role-based permission system.
Gerrit is a Web-based code review system, facilitating online code reviews for projects using the Git version control system. Gerrit makes reviews easier by showing changes in a side-by-side display and allowing inline comments to be added by any reviewer. Gerrit simplifies Git-based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged by hand by the project maintainer. This functionality enables a more centralized usage of Git.
Submin provides a Web-based admin interface to your Subversion repositories. Its features include user/group management, path permission management, and the ability to create svn repositories. It uses htpasswd/svn authz for authentication, so it can use the same login information as apache2/svn (and trac). It works with FF3, IE7, Safari 3, Chrome, and Opera 9.
RepoManager offers a minimalistic approach to Web-based management of version control system repositories. Its goal is to simplify effective handling of repository permissions for a large number of users. Using RepoManager, users themselves are able to grant others permissions to use their repositories whenever they want.