Microsoft has released what’s more or less a stripped-down version of their multitouch Microsoft Surface; in face, there’s no surface included at all. Anyone with a webcam (and Windows) can try it out. From Geek.com:
Although many developers may be waiting for the release of the Surface SDK expected later this month, Microsoft have in fact released another touch-related SDK you can play with right now.
Called Touchless, this SDK allows you to experiment with multi-touch applications with little investment in hardware. In order to use Touchless all you need is a webcam as the video above demonstrates.