FreeSOLID is a library for collision detection of three-dimensional objects
undergoing rigid motion and deformation. FreeSOLID is designed to be used in
interactive 3D graphics applications.
3-DPhysicsSim is an interactive 3-D physics simulator.
3-DPhysicsSim is an interactive 3-D physics simulator which allows you to create a scene filled with objects and see how the objects act in real-time when governed by the laws of physics.
3-DPhysicsSim was created with the help of Irrlicht, WxWidgets and Bullet
Step is an interactive physical simulation program for education. StepCore is a physical simulation library on which Step is based. Please refer to http://edu.kde.org/step for more details.