You can shoot full sphere panorama photos (which Google calls photosphere) with your stock camera app. But you have to have JB 4.2 (Not 4.1.x). Here is how;
- Go to the camera. Tap on the camera icon and pick the item that looks like a small globe with a panorama stretched over it. That's the Photo Sphere mode.
- Take a picture as usual.
- Keep your camera steady.
- You should see a message to align your camera with the blue dot. Tilt your camera up, down, left, or right slowly to match the center of the screen with the blue dot for the next area. The picture will snap automatically when you get there.
Note: this may look a little weird if you try to take pictures of people, since they tend to move between shots. Landscapes and interior shots are your best bets.

