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
Remote Duck - Stranger on the Internet that can help you debug your code
Demodesk - Collaborative screen sharing for sales & success teams
Sublime Tutor - Learn Sublime Text from a tutor who sits inside the editor
Surfly - Simple, Fast, and Secure Co-browsing