r2witco:

Adobe brings Photoshop.com to the iPhone

The app is free of charge and offers tools such as cropping, image rotation, color controls, and simple one-touch filter effects that can change the look and feel of shots all at once. It also features undo and redo controls so that if users make a mistake, or want to revert back to the original, it takes just a few taps.

via CNET News

Next: a light ap for video please.