Cubit - Open Source Multitouch Display. Touchlib - Home. Touchlib is a library for creating multi-touch interaction surfaces.
It handles tracking blobs of infrared light, and sends your programs these multi-touch events, such as 'finger down', 'finger moved', and 'finger released'. It includes a configuration app and a few demos to get you started, and will interace with most types of webcams and video capture devices. How to build a cheap touchpad for your computer.