"Many very talented developers have produced some amazing applications built to take the iPhone’s photographic capabilities to the next level by giving us tools to enhance our images. Some of the favorites are CameraBag, QuadCamera, Best Camera, Toy Camera, and TiltShift Generator. All of these apps are essentially post-processing tools that edit the photos hue, saturation, contrast, exposure (kind of), and maybe offer a couple of other specialized effects like vignetting and framing" - Chris Miles