Sick of being harassed just for trying to extend the functionality of your graphing calculator? Matt from Antipasto Hardware has the solution with his 100% Open Source HW/SW R-Based Graphing Calculator. Based around the Beagleboard embedded Linux hardware, it can run the sophisticated R programming language. Looks great! Of course, the hardware costs a bit more than the proprietary calculators. Anyone want to port this to Android?
DIY graphing calculator made with Beagleboard