Picoli

Picoli's touch-up application for iPhone may not carry any of the big guns of desktop image editors, but it can help correct for brightness, color, balance, and sharpness on any photo in your camera roll. You'll also be able to flip and rotate images and pick from a handful of effects. There's no red-eye correction in this straightforward application, and no history to undo filters after you've had second thoughts, but the application does save the tweaked image separately.

There are two ways to engage Picoli effects: pressing a menu button or by tapping the image once and using arrows to scroll through the filter options. After you preview the change, you'll be able to cancel or save the new image. Easy-to-use, Picoli is especially beneficial if you upload photos directly from your iPhone. Even if you don't, it might just erase your need for a full-blown image-editing altogether.