TryCode - Realtime collaborative code editor (beta)
codepad - Very simple webpage with a simple textbox, a checkbox for selecting one of several languages and an...
Codefile - Create collaborative code files & share it in real time
Betterer - Improve your codebase, incrementally
CodeShare.io - Realtime code sharing for developers
CodeMyUI - Handpicked code snippets you can use in your web projects