Raspberry Pi Motor Driver Board v1.0 by SeeedStudio is based on the Freescale MC33932 dual H-Bridge Power IC, which can control inductive loads with currents up to 5.0A peak per single bridge. It lets you drive two DC motors with your Raspberry Pi B/B+/A+ and Pi 2 Model B, controlling the speed and direction of each one independently.
Raspberry Pi Motor Driver Board v1.0 supports a very wide range of input voltages from 6V~28V. Alternatively, the onboard DC/DC converter supports a very wide range of input voltages, and can provide a 5V power supply for the Raspberry Pi with 1000mA maximum current. This allows you to only use one power supply to drive the motors and power up the Raspberry Pi.