Snapseed - Snapseed is a photo enhancement and sharing app with a powerful suite of imaging filters and tools...
Hipstamatic - Hipstamatic is a world-class photography app and Apple’s original App of the Year.
Vignette - Vignette: Add film and camera effects to your photos. • 68 effects & 56 frames
PicsArt - Explore 100,000,000+ awesome images and photos on the web
Paper Camera - Paper Camera is the BEST Sketch/Cartoon app in the App Store.
Lo-Mob - Lo-mob brings lo-fi and photographic experimentations to your mobile pictures.