Any free online photo-editing sites like Photoshop?

I’ve tried photoshop.com, photobucket… Ugh. I’m trying to put my face on a celebrity’s body for a little project, but… it’s impossible. I like PHotoshop, I’m ROP-certified in Computer Graphic Arts, but like an idiot I never bought my own program, just used the ones at school. I want a site where I can put the images on seperate layers, like Photoshop, and rotate, erase, etc, then merge them. Does this exist??