Robotics

BeBits: RobotWar
Features information, screenshots, and download for BeOS.
http://www.bebits.com/app/1792/

BotWarz
A project based on Bot Arena.
http://student.uq.edu.au/~s348521/plasma/botwarz/

Grobots
A game in which teams of robots eat, fight, and reproduce under the control of programs written by the players (in a simple dialect of Forth). GPL; runs on Mac and Windows.
http://grobots.sourceforge.net/

JBotRace
A car racing simulator in which the cars are driven by robots. The robots are small programs written in Java and it is the player's task to program the fastest robot.
http://jbotrace.sourceforge.net

Research Projects: Mission Lab
MissionLab takes high-level military-style plans and executes them with teams of real or simulated robotic vehicles.
http://www.cc.gatech.edu/ai/robot-lab/research/MissionLab/

Robocode Face2Face Competition
Robocode one-to-one competition based on direct elimination. Tournaments are held every two weeks.
http://www.geocities.com/albert_pv/

Robot Race
A free Robo Rally clone.
http://rr6.sourceforge.net/

Robot War Competition
Prizes and information regarding the competition at the IIT chapter of the Association for Computing Machinery.
http://www.iit.edu/~acm/robotwar/

Robots and SRobots
Two programming games written in Comal.
http://www.geocities.com/Area51/Crater/8435/robots.htm

RoboWars
Requires players to build a robot using C or C++ and then compete against other robots.
http://www.deepnettech.com/robowars.html

VBRobots
Program robots in VBScript or JavaScript and fight them in an arena.
http://www.geocities.com/dtfinch/VBRobots.html