CKEditor : CKEditor is an open source WYSIWYG text editor designed to bring common word processor features directly to web pages, simplifying their content creat...
Styletron : Styletron is a universal CSS-in-JS engine built from the ground up for high-performance.
Codassium : A better way to conduct remote interviews
WebRTC based video chat + code editor = Awesome interviews
EtherPad : Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
