I just pushed the latest version of an open-source tool I’ve been working on that sends touch events of a trackpad via OSC. It currently only works for Apple trackpads (MacBooks, maybe Magic Trackpads?).

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The app reads finger data from the trackpad, assigns a unique ID to each finger, and continuously sends OSC events about the position, orientation, size, etc. of the touch event. These OSC events can be read by something like Unity 3D, so that you can test a mobile multitouch interface without having to compile to a touchscreen device. I’ve made small demos for Unity 3D, Processing, and Flash, so hopefully everyone can find a cool use for this!

Check out the GitHub here: https://github.com/dboehle/SendMultiTouches

Or download the app directly from GitHub: http://cloud.github.com/downloads/dboehle/SendMultiTouches/Send%20Multi%20Touches.app.zip

Let me know what you think!