There was once a time when editing photos was something that would take a pretty high end computer and a graphics suite that was expensive enough to make your eyes water. These days though, it's possible to do some rather impressive things using nothing but a Web browser and a nice stable Internet connection. Fotor is one service that lets users upload images and then edit them from the safety of the browser window, with no need for something as unwieldy as 'real' photo-editing software.
