http://www.cloud9ide.com/ http://www.cloud9ide.com/ and https://bespin.mozillalabs.com/ https://bespin.mozillalabs.com/ come to mind, although the former seems

http://www.cloud9ide.com/ http://www.cloud9ide.com/ and https://bespin.mozillalabs.com/ https://bespin.mozillalabs.com/ come to mind, although the former seems more like an IDE. there used to be a vanilla Eclipse IDE running in a web browser that was built on top of qooxdoo, but i can't find it right now.