I have tried 4 or 5 free photo editing tools on-line and have found that Ribbet works great for me so I pretty much use it exclusively daily and sometimes 1-2 times a day. So easy and I signed up though it is still free. The reason to sign up and get a log-in and password is so that you can upload many documents at the same time. I love the CLONE tool and you have to sign-in to use this particular tool inside Ribbet.
Try Ribbet and I think you will like it a lot and the price is right...FREE.