GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Zeplin - Collaboration app for UI designers & frontend developers
SourceTree - Mac and Windows client for Mercurial and Git.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
ActiveWords - Auto correct on steroids