This modified servo is great for simple projects and lightweight robots.
This is a great option for a robotic platform with differential steering.
The 1066_1 PhidgetAdvancedServo 1-Motor allows you to control the position, velocity, and acceleration of one RC servo motor.
The PhidgetStepper Unipolar allows you to control the position, velocity, and acceleration of up to 4 unipolar stepper motors.
The Sabertooth 2X12 is one of the most versatile, efficient and easy to use dual motor drivers on the market.
If you're looking for a base for your next robot, look no further than the Rover 5. This 4 motor monstrosity takes any terrain by storm.... just don't take it out in a storm... please!
You know and love the GM15, but hate the pulley shaft? Ok, ok - here's a more standard "D" shaft configuration!
The VS-9 Pico Servo is a strong little servo motor for it's size, it's like that little kid that the neighbourhood bully used to pick on that ended up giving the bully a black eye!
This is the tiniest gear motor we've seen that's humanly affordable. What can you do with it? Ummm...
This surplus wheel set comes with one motor, two sets of wheels (two standard, two wide plastic studded tires and plastic hubs) and four guide rollers.
SparkFun's collaborative effort with Brian Schmalz makes the EasyDriver stepper motor driver compatible with anything that can output a digital 0 to 5V pulse.