TUIO Multitouch Plugin for Qt
I wrote a multitouch plugin for Qt 5 that understands the "TUIO":http://www.tuio.org/ protocol. This lets me use Qt 5 to develop applications for Perceptive Pixel hardware. The source code is available on github.
It works pretty well on Red Hat Enterprise Linux 6. I haven't tested it on other platforms. This source code uses boost to implement the networking protocol. Also, the plugin is not automatically loaded; I have to pass "-plugin TuioTouch" to my applications.