Augmented Reality is where you take a camera and overlay digital images on the picture. These pictures are then anchored to certain items, so when you’re looking at an object, you can see the digital addition, but if you move the camera, the digital addition stays with the object.

ARToolKit is a system to build Augmented Reality applications in. It’s available for windows, linux, macos and there are a whole load of extensions

Studierstube is a total rebuild from ARToolkitPlus which was modified from ARToolkit. This was first optimised for windows and is now optimised for mobile devices – ie. windows mobile.