Adafruit 1580 PCB extension board 1 pc(s) Compatible with (development kits): Raspberry Pi

The AR1100 acts as a touch signal to USB converter and also comes with calibration software. The calibration software is for Windows only, but the screen works with any OS. The AR1100 shows up as a regular mouse or digitizer HID device so no drivers are required. The device was tested successfully on Mac, Windows, and Raspbian on a Raspberry Pi.

Price: 29.99 from Conrad Electronic