CodeShare.io - Realtime code sharing for developers
asciiflow - Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
CodePile - A simple, free & rich collaborative code sharing experience
PabloDraw - PabloDraw is an Ansi/Ascii text and RIPscrip vector graphic art editor/viewer with multi-user capabilities.
Code2Flow - An easy solution to create product flows.
JavE - JavE (Java Ascii Versatile Editor) is a free Ascii Editor.