Cropp.me is a excellent site for cropping images that I found about from Free Technology 4 Teachers. This site allows users to upload photos and then crop their photo or pre-select a number of cropping templates. Best of all a person Cropp.me can automatically crop a photo by detecting the source image and adjusting accordingly.
I recommend checking out Cropp.me by clicking here!!
Click here for my top 10 sites for photo editing.