4WD 58mm Omni Wheel Arduino Robot Kit – 10020 – Oz Robotics
Boe-Bot Robot Kit - Serial - Parallax
Amazon.com: MakerFocus DIY Robot Car Smart Chassis Kit with Speed Encoder 4 Wheel 2 Layer for Ar duino UNO MEGA2560 MEGA1280 51 Microcontroller Board : Toys & Games
Romeo - a Robot Control Board with Motor Driver (compatible with Arduino) - DFRobot