Another interesting physical computing platform; the PIC-based Create USB Interface. The original design was made by Dan Overholt as a bridge between computer and world for musical and artistic applications. Seeed Studio has an updated design called the CUI32Stem, which has been tweaked to work well with the thirty-something sensors and actuators in their GROVE collection.
The CUI32Stem can run Arduino code using the Chipkit “Multiplatform IDE” developed by Microchip. It also supports a free Real-Time Operating System called StickOS which allows you to program it in BASIC.