drawbook was one of my first team projects at university. It is an interactive guest book for a large touchscreen, which was planned to be integrated into the base of a statue. Supporting multitouch, it enables visitors to simultaneously write or draw with others or with multiple body parts. The overview shows every drawing as a tile, which can be enlarged by touching; Touching an empty tile will open the drawing tool. Besides changing the colour and the size of drawing, it is possible to take a picture via the integrated webcam.
Feel free to check out the source code.