Have a look at Atlassian SourceTree. It's a free Git Client for Windows & Mac.
I'm using it since the beta. And it's really the best tool ive ever used for git in my opinion.
Say goodbye to the command line – use the full capability of Git and Mercurial in the SourceTree desktop app. Manage all your repositories, hosted or local, through SourceTree's simple interface.
More informations under:
http://blog.bitbucket.org/2013/03/19/introducing-sourcetree-git-client-microsoft-windows/
http://www.sourcetreeapp.com/
