Posterous. ColorBox HD. Adobe Photoshop Express. Paper Folding for iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) and iPad on the iTunes App Store. Doodle Buddy - Paint, Draw, Scribble, Sketch - It's Addictive! Room Planner by Chief Architect. Halftone.