An online Java-based simulator that allows users to construct robots and other mechanical creations and watch them walk, move, or fly. http://www.sodaplay.com/
Research and educational tool for multi-agent systems and artificial intelligence. It enables two teams of 11 simulated autonomous robots to play soccer. The multiplatform C++ code is Free Software licensed under the GNU GPL. http://sserver.sourceforge.net/
A rigid body dynamic simulation package ideally suited for simulating legged robots (bipeds, quadrupeds, hexapods), robot arms, Stewart Platforms, and other mechanisms. http://yobotics.com/simulation/simulation.htm
3D Soccer simulation that uses teleo-reactive programming to expose the fundamental ideas involved in the creation of autonomous agents to students. Proprietary software for Microsoft Windows. May be downloaded and used without charge for education purpos http://www.trsoccerbots.org/
Allows creation of 3D virtual worlds populated with multiple simulated robots. Supports customized wheeled, legged or flying robots. Includes API for robot control, physics, a complete library of sensors and actuators, and communication capabilities. Prop http://www.cyberbotics.com/products/webots/
ODE is a platform independent C++ library for simulating articulated rigid body dynamics; ground vehicles, legged creatures, or moving objects. Supports advanced joints, contact with friction, and built-in collision detection. ODE is Free Software license http://opende.sourceforge.net/
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/