Lalalab - Print photos from your iPhone
Impossible I-1 Instant Camera - Take real polaroid photos with your iPhone
ZUtA Labs - Pocket robotic mobile printer
Sprocket Printers - Create instantly stickable photos in seconds
CHEERZ – Photo Printing - CHEERZ – Photo Printing app lets you print photos from Instagram, Facebook, and other memories from your phone with few steps.
The Polaroid Lab - Turn your smartphone photos into polaroids