RARS
RARS is the Robot Auto Racing Simulation, in which the drivers are robot programs. It is intended as a competition among programmers.
http://rars.sourceforge.net/

Robot Auto Racing Simulator
RARS is intended as a competition among programmers. It consists of a simulation of the physics of cars, a graphic display of the race, and a robot driver for each car. RARS is Free Software written in C and C++ and licensed under the GNU GPL.
http://rars.sourceforge.net/

Yobotics! Simulation Construction Set
The Yobotics Simulation Construction Set is a software tool for dynamic simulation of robots and biomechanical systems.
http://yobotics.com/simulation/simulation.htm

Mr Robot
Robot Kits, Microcontrollers, robot kit, Lego, robot books, for sale by robots who care about robotics
http://www.mrrobot.com/

Irobotics India
Gerard Sequeira's robots. Includes information on his fire fighting robot, a golf playing robot based on the PIC16F84A, and a line following robot.
http://www.geocities.com/gear996/

EASY-ROB
EASY-ROB 3D Robot Simulation Tool is a powerful, comprehensive modelling and simulation tool, to create high quality and high speed rendered images for animation of 3D Scenes. Processes from the robotics and mechanical engineering field are programmed and visualized immediately. The program is a 32-bit Microsoft Windows application using the Microsoft Foundation Classes (MFC) and the capabilities of OpenGL. It is especially designed to fulfill requirements for several industrial robotic applications and for the small industry. EASY-ROB is as well as especially designed for educational purposes.
http://www.easy-rob.de/

Rock 'em, sock 'em Robocode
Is it possible to learn inheritance, polymorphism, event handling, and inner classes, all while dodging bullets and executing precision attack maneuvers? A surprisingly addictive teaching-tool-turned-game-craze called Robocode is about to make this a reality for Java developers worldwide. Follow along as Sing Li disarms Robocode and starts you on your way to building your own customized lean, mean, fighting machine.
http://www-128.ibm.com/developerworks/java/library/j-robocode/

Robot Riots robot combat event
Robot Riots - Toronto Robot Fight Club - Robot Combat competitions in the Toronto, Ontario area.
http://www.robotriots.com

The Robot Lab
Build a robot! It's really not that difficult. We'll show you how. We have robot kits for builders of all levels.
http://www.therobotlab.com/

NEC PaPeRo Personal Robot
A prototype research robot designed to live with humans at home as a partner. The robot can recognize faces and navigate a typical home.
http://www.incx.nec.co.jp/robot/english/robotcenter_e.html