I've used the GitHub web editor a few times. It's painful, but gets the job done for quick fixes.<p>I've also tried out TouchQuode a while back and talked to the author a bit - it was a nicer editor even then, but it didn't integrate with git at the time, so I didn't use it much. <a href="http://www.touchqode.com/" rel="nofollow">http://www.touchqode.com/</a>