Layar is a free application on mobile phones which shows what is around the user by displaying real time digital information on top of reality through the camera of the mobile phone. Layar is a global application, available for the T-Mobile G1, HTC Magic and other Android phones in all Android Markets. It also comes pre-installed on the Samsung Galaxy in the Netherlands. Layar is used by holding the phone in front of the user’s perspective (like a camera) and information is displayed on top of the camera display view. For all points of interest which are displayed on the screen, information is shown at the bottom of the screen.
On top of the camera image (displaying reality) Layar adds content layers. Layers are the equivalent of web pages in normal browsers. Just like there are thousands of websites there will be thousands of layers. One can easily switch between layers by selecting another via the menu button, pressing the logobar or by swiping your finger across the screen. Layar combines GPS, camera, and compass to identify surroundings and overlay information on screen, in real time.More information:
http://layar.eu/