NanoBorg - Powerful motor control in a nano sized board
PiBorg's mini me. Small but fiendishly powerful robotics control board for your Raspberry Pi.
The NanoBorg is an open source add on board capable of controlling two DC motors in forward and reverse, with or without the Raspberry Pi Pulse Width Modulation (PWM) control. The board is externally powered with a 5V to 24V battery or power supply