Tuple - Tuple is a Mac-only remote pair programming tool for discerning developers
gitsome - Supercharged Git/Shell autocompleter w/ GitHub integration
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.
USE Together - Collaborative screen sharing with multiple mouse cursors
YOURLS - YOURLS is a website that contains all the tools you need to create and launch your very own URL shortener. URL shorteners like bitly or TinyURL are fine for public use, but they offer limited options in terms of URL customization.