TouchKit by NOR_/D : This is a variation of Graffiti Research Lab's L.A.S.E.R Tag ported to the TouchKit.
Touche framework : Touche is a free, open-source tracking environment for FTIR-based multitouch tables.
#000000book : #000000book is an open repository for sharing and archiving motion captured graffiti tags. Tags are saved as digital text files known as GML (Graffiti...
The Beta, tbeta for short, is a open source/cross-platform solution for computer vision and multi-touch sensing. It takes an video input stream and outputs tracking data (e.g. coordinates and blob size) and touch events.