9ne (pronounced "nine") is an online code editor based on Emacs (Copyright 2006 Rob Rohan). 9ne is a recursive acronym and joke, and means "9ne is not Emacs".
9ne source is availabile on GitHub
9ne currently works the best on Mac OS X with Safari, Firefox, Flock or Camino. It also works on Windows with Firefox or IE6 and 7 with a few hiccups here and there. It has been mildly tested on Linux with varying degrees of success.