Photos of my fireplace, settings "1962," "Holga," and "Lolo" respectively.
CameraBag is a beautiful application that lets you mimic the unique characteristics of certain cameras and lens on your iPhone. You can take photos on a certain setting (ie. "Fisheye") or you can take existing photos from your library and tweak them. The best part is that the application works with the weakness of the iPhone's camera, since graininess and weird color saturation are part of an old photo's charm.