Git Extensions is a toolkit aimed at making working with Git under Windows more intuitive (note that Git Extensions is also available on Linux and Macintosh OS X using Mono). The shell extension will integrate in Windows Explorer and presents a context menu on files and directories. There is also a Visual Studio plug-in to use Git from the Visual Studio IDE.
There are video tutorials for some basic functions on YouTube.
See the following links for the Git Extensions download page, source code and documentation.
Please feel free to raise any issues with Git Extensions or its documentation at the appropriate Issue tracker link as shown above.