RunVCS is a restricted shell that allows the user to run version control software and only access specified repositories. It also provides other useful features such as changing the username that is passed to programs. Only SVN is supported currently, but more version control systems will be supported over time.
repos-tools is a set of command-line utilities to make work on your code repositories faster and easier. It lets you push, pull, build, and do other things on your repositories all at once. The supported (D)VCSes are Git, Subersion, Bazaar, and Mercurial. For GitHub users, forking, following, watching, and dealing with issues can be done from the shell.
Onzen is a graphical front end for the CVS, SVN, HG and Git revision control systems. It represents the files managed by the RCS in a tree view with detailed information and offers functions to update, commit, add, remove, rename, revert, diff, view files, and many more functions.