Cubespin is an entertainment application that allows you to view pictures from your device's photo library on a rotating 3D cube. Just touch the moving cube to pick an image from the photo library. If you touch the info button in the upper right hand corner you get a view with options to (1) control whether touching a face of the cube adds a picture to just that face or all faces; (2) control the cube's rotation; (3) control the transparency of pictures on the cube.