HiLetgo L293D DC Motor Drive Shield Stepper Motor Drive Shield Expansion Board for Arduino Duemilanove Raspberry Pi

This is a commonly used DC motor drive module, using a small current 293 chip DC motor driver chip.
Using this chip you can use DC motors and power supplies of up to 10 Volts, that some pretty big motors and the chip can supply a maximum current of 600mA per channel.
d compatible for Arduino Mega, Diecimila & Duemilanove.
2 interface for 5V Servo connected to the Arduino's high-resolution dedicated timer - no jitter.
Multi-function, easy to operate, a strong driver library support and feature updates.