Fotoflexer is another available photo editor that you can use online for free.

Watch the (TEAMcav) video below for a quick tutorial that covers
the basics of cropping, layering, and saving edited photos.

Other online tutorials/info:

http://fotoflexer.com/demos.php

https://www.youtube.com/watch?v=8-GVZaT5KC8&feature=related

https://www.youtube.com/user/tomwhyte13#p/u/12/e8YEqh8YXNc

https://www.youtube.com/user/tomwhyte13#p/u/14/LIRb3IDRz10