Tuple - Tuple is a Mac-only remote pair programming tool for discerning developers
Gitmoji - An emoji guide for your GitHub commit messages
Kite - Kite helps you write code faster by bringing the web's programming knowledge into your editor.
Commit Together by Github - Now add co-authors to your commits
replit - Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
GitStats - A local GitHub-like contributions calendar