git-flow Python Edition is a a pure Python implementation of git-flow. All sub-commands share a common back-end to ensure features behave the same, whatever branch-type they are working on. New workflow behavior can also be added easily by simply sub-classing existing ones. It also includes a comprehensive unit test suite, decent man pages, and HTML docs.
GitFS is a fuse- and git-based remote filesystem with local cache for disconnected operation. It does periodic commits and pushes/pulls to keep a local shadow file system in sync with a remote repository. The filesystem should continue to work when you are disconnected. Merging after disconnected updates from multiple locations is left to 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.
Meld is a visual diff and merge tool. It integrates with most version control systems. The diff viewer lets you edit files in place (diffs update dynamically), and a middle column shows detailed changes and allows merges. The margins show location of changes for easy browsing, and it also features a tabbed interface that allows you to open many diffs at once.
0release is a program to generate source and binary releases automatically. With minimal configuration, 0release will generate a source tarball release candidate, build it to create a binary archive, upload them to your Web server, check the uploads, and tag the release in GIT and update the version number. It can run unit-tests and custom actions, such as building documentation, etc. For Zero Install users, it can also upload a signed XML metadata file about the release, allowing these users to upgrade automatically. Releases are signed with your GPG key.
GitBlogger is a small tool that allows you to write blog posts in reStructuredText using an editor of your choice, commit your posts to a git repository, and then have them automatically converted to Blogger blog posts when you push your repository to another repository. GitBlogger handles creating, updating, and deleting Blogger posts in response to changes in the git repository and handles renames in your git repository.