git-cola

git-cola is a powerful graphical user interface for Git. It is written in Python (v2 + v3) and Git. It allows integration into the Windows Explorer context menu. It also allows you to create and join branches, export tarball files from Git, apply patches or use the browser to get history from remote repositories. There are also tools to show differences between older and newer versions of a file, create and edit tags, customize the editor, etc.