Prspctv is a simple tool for projection mapping. You can map image texture or movie texture in iPhone/iPad Photo Library to any surface in real scene.

Features
-You can map up to 32 rectangle polygons.
-You can edit positions, sizes, rotations, UV coordinates and vertexes of polygons.
-You can change colors (RGBA) of polygons.
-You can display images loaded from Photo Library.
-You can display Movies loaded from Photo Library.

Simple projection mapping tool for iPhone/iPad
http://www.youtube.com/watch?v=hnC9rh30sGU

*This app requires a projector which can connect to iPhone or iPad.