Leonar3Do is a 3D modeling tool that allows you to model while you actually see the object you're working on in 3D in front of you. You have on 3D glasses and use a 3D marker to model. The marker is tracked and the model is projected in front of you. It should be coming out in a few months and will cost $1000. If this is even a quarter as good as it looks it will be amazing.