Impossible I-1 Instant Camera - Take real polaroid photos with your iPhone
Duotone - Convert any photo to a duotone in seconds
Prynt - Turn your smartphone into a Polaroid
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
AiryCam - Look good in every photo
Photo + Music = Video - Photo + Music = Video (also known as Video Slideshow Editor) developed by Manas Hive.