Webots robot simulator went open-source
(github.com)Webots is a free and open-source 3D robot simulator used in industry, education and research. It includes a large collection of freely modifiable models of robots, sensors, actuators and objects. The robot controller programs can be written outside of Webots in C, C++, Python, ROS, Java and MATLAB using a simple API. Webots can stream a simulation on web browsers using WebGL.