The Sabertooth 2X5 is one of the most versatile, efficient and easy to use dual motor drivers on the market. It is ideal for smaller robots- up to 3lbs in combat or 25 lbs for general purpose use. Made by Dimension Engineering.
This is a larger IG32 gear motor robot that utilizes three omni-wheels to vector it in any direction. By changing the speeds and directions of the motors the robot can drive in any direction without needing to turn.