This simple obstacle-avoiding robot by forum user TomatoWire is based on the Maestro and uses continuous-rotation servos and distance sensors. The robot is programmed using the Maestro’s internal scripting language, without the need for an additional microcontroller.

Featured link: http://forum.pololu.com/viewtopic.php?f=2&t=2756

AIRbot is a robot that can be controlled by a cellphone and can send images back to the cellphone. It uses a yellow RP5 tracked chassis, a transparent clear RP5 expansion plate, and a qik 2s9v1 dual serial motor controller along with the AIRcable S.D.K. and the AIRcable OptiEyes. The source code (both AIRcable and Nokia) and circuit diagrams are freely available.

Featured link: http://wiki.opensensors.org/airbot

In this project, an HD camcorder sits on a pan/tilt mount controlled by a Micro Maestro 6-Channel USB Servo Controller. A Wiimote is used to track an IR light source. Here is a video taken from the mounted camcorder:

Featured link: http://helifreak.com/showthread.php?p=1868143#post1868143

This instructable shows how to power an Arduino through the Pololu Pushbutton Power Switch and use the self-shutoff feature.

Featured link: http://www.instructables.com/id/Using-the-Pololu-Pushbutton-Power-Switch/

This module for RoboRealm provides an interface to the Pololu Maestro USB servo controllers, linking advanced video processing to RC servo motion control.

Featured link: http://www.roborealm.com/help/Pololu_Maestro.php

This replica of the famous Star Wars droid R2D2, built by Glenn Pipe, uses a Jrk USB motor controller for position control. The video below shows how Glenn uses the Jrk Configuration Utility to control and analyze his system, and his blog post has more information.

Featured link: http://astromech.wordpress.com/2010/02/05/adding-position-control-to-r2s-dome/

Patrick Hickey and Bradley Lord use a Pololu Micro Maestro for servo output and a Pololu 4 servo multiplexer to support manual control override in their model aircraft autopilot project.

Featured link: http://moreproductive.org/autopilot/

In this video, Meindert Norg from Norg Consulting demonstrates his active magnetic bearing, Tripod Floater. The closed-loop system uses three Pololu 18v15 high-power motor drivers as PWM amplifiers to power the magnetic coils that keep the module floating beneath the metal plate.

February, 2010 update: the Tripod Floater is now wireless:

Featured link: http://www.youtube.com/watch?v=e-f_H68Rl4g

Customer Mark Goodson constructed this spooky animatronic skeleton using the Jrk USB Motor Controller. See the final result below:

Featured link: http://www.youtube.com/watch?v=wiimQNGnNBY

This beacon-chasing robot by Christopher Hazlett was built with our IR Beacon, an RP5 Tracked Chassis, and an Arduino.

23 Oct 2018 edit: You can find a video of it driving here and a GitHub page here.