By Microsoft Corp. Free. For Apple devices only.
Photosynth lets you take 360-degree panoramic photos that become interactive on a smartphone or computer screen. The app guides you as you stand in one place and capture photos in all directions. Then it stitches those images together to create a sphere-like panorama that viewers can scroll around in and zoom in and out.
You can share the panorama on Facebook, Twitter or Photosynth.net.