DeepAffects - Increase team dynamics & productivity.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Gitential - Analytics for Git Repositories
SourceTree - Mac and Windows client for Mercurial and Git.
GitPrime - GitPrime uses data from any Git based code repository to give management the software engineering metrics needed to move faster and optimize work patterns.
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.