SourceTree is a free Mercurial and Git Client for Windows and Mac that provides a graphical interface for your Hg and Git repositories. Developed by Atlassian
License: Free
SourceTree is a free, user-friendly Git GUI that excels in simplicity and ease of use, making it ideal for beginners. In contrast, SmartGit offers advanced features and flexibility, catering to more experienced users and larger projects, but comes with a steeper learning curve and a paid model for commercial use.