collabedit
Real-time, browser based, collaborative text editor. It supports syntax highlighting for several programming languages, has integrated chat, requires no sign up and is very simple to use.
Plunker
Plunker is an online community for creating, collaborating on and sharing your web development ideas.
CodeBunk
CodeBunk provides a Realtime Collaborative Editor with Compile/Run. CodeBunk is an Online Compiler/Interpreter for PHP, Python ...
Squad
Squad is a collaborative web-based code editor with one goal: to make it easy to open, edit, and share code in real time. Our ...