GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
SourceTree - Mac and Windows client for Mercurial and Git.
Invision - Prototyping and collaboration for design teams
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Sketch - Professional digital design for Mac.