chipKIT Uno32 Arduino Uno form factor 42 available I/O Microchip PIC32MX320F128 processor 80 Mhz 32-bit MIPS 128K Flash, 16K SRAM Compatible with existing Arduino code examples, reference materials and other resources through the use of a modified version of the Arduino IDE, available as a FREE download Can also be programmed using Microchip's MPLAB (along with a PICkit 3 or 6-pin header)