TortoiseGit

TortoiseGit screenshots

Open source Windows Shell Interface for Git based on TortoiseSVN
Cloning
TortoiseGit 2.0 : Cloning

Alternative downloads

Microsoft Visual Studio Tools for Git
It's a Team Explorer extension to provide source control integration for Git.
0.8.5.1
FREE
GitKraken
Git client that can connect to services like GitHub, Bitbucket and GitLab.
3.2.1
FREE
Git LFS
Open source Git extension for versioning large files.
1.4.1
FREE