GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Beeminder - Beeminder
SourceTree - Mac and Windows client for Mercurial and Git.
GoalsWon - Human accountability coaching for busy people
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Coach.me - Coach.me is a coach that goes everywhere with you, helping you achieve any goal, change any habit, or build any expertise.