GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
pre-commit - A slightly improved pre-commit hook for git
SourceTree - Mac and Windows client for Mercurial and Git.
pre-commit by Yelp - A framework for managing and maintaining multi-language pre-commit hooks
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line