Duotone - Convert any photo to a duotone in seconds
Impossible I-1 Instant Camera - Take real polaroid photos with your iPhone
Photo + Music = Video - Photo + Music = Video (also known as Video Slideshow Editor) developed by Manas Hive.
Prynt - Turn your smartphone into a Polaroid
EditedImages - The web's best photoshopped images
Tech GearLab - An independent tech product rating site performing rigorous side-by-side comparative reviews