Google Earth for iPhone

Google Earth lets people virtually fly around a 3D view of the world made from satellite and aerial imagery mapped onto the planet's mountains and valleys. The iPhone version reproduces this core experience, downloading imagery from Google's servers as the perspective shifts and dotting the map with landmarks, photos, and other information. iPhone's multitouch screen actually made using the application easy. Dragging a fingertip across the screen slides the view appropriately, of course. Two-finger pinch gestures not only zoom in and out, but also, by adding a little twirling rotary motion, steer the view's orientation in one direction or another.