Collabedit is a feature loaded free online real-time collaborative code editor with built in chat. Extremely easy to use, Collabedit lets you collaborate with your friends on coding projects in real-time, from the comfort of your browser. There are no sign-ups, accounts, or anything of that sort required. All you have to do is start typing code, and invite others to collaborate on it via a unique sharing URL.
Via Frédéric DEBAILLEUL