Manual Camera for iPhone - Custom exposure for your iPhone camera
Disposable Camera App - A roll full of surprises, printed and shipped for $12.99
Argentum Camera - A monochrome camera with beautiful effects
EverChanging: Disposable Memories - Disposable camera app that doesn’t suck.
Fotr - An analogue camera in your iPhone
Printsnap - Disposable camera plugin for Snap — mail photos to your door