There are several online photo editors available, however, FotoFlexer appears to be the most full-featured to date. Try it before logging in, I think you will find it is easy-to-use with many of the expected features you might expect; but I was pleasantly surprised by the "Geek" tab for advanced options in addition to allow saving multiple layers. For the novice users it has an "Add a face" option which I'm sure we can use to brighten someone's day, happy photo editing.