Flatland is a simple cross-platform object-oriented 2D collision library. It presents a C++ interface to the Open Dynamics Engine physics SDK. Flatland does not handle graphics, but two sample programs are available, both of which use OpenGL.
Foundational Physics is a 2D physics engine written in Java for entertainment and educational purposes. With a robust groundwork, its aim is to provide an easy interface for programmers to easily manipulate a Newtonian physics environment.
Ruby-Newton is a Ruby wrapper for the NewtonGameDynamics physics engine ( http://newtondynamics.com/ ) It brings object-oriented real-time animated physics simulations to Ruby-enabled applications (e.g. 3D modeling tool with interactive scripting support
Note: New versions are not being posted to source forge. Please check the project homepage at: http://www.cove.org/flade A free library for simulating 2D physics in Flash using Verlet integration. It currently features particles, stick & angular constra
jME Physics System provides an interface between jME (Java Monkey Engine) and ODE (Open Dynamics Engine). It sits on top of a slightly modified version of odejava, and provides a way to very easily set up a physics world and add objects to it.
sheep is an open source rigid body dynamics engine written in modern, strictly portable C++. It features collisions between hierarchies of convex polyhedra (using the SWIFT library), resting contacts handling and an extensible set of joints.
OpenSim - Open Simulator. Primarily a 3D simulator for multiple indoor and outdoor mobile robots. Includes 3D real-time rendering (via OSG) and a physics engine (via ODE). Current emphasis is on manipulators.
ODE for Java is a binding between C dynamics library ODE (Open Dynamics Engine, http://ode.org) and Java. Separate packages provide among other things a Java3D integration and thus a scenegraph representation of selected ODE objects.
Damocles is a game engine programmed in C++.(Opengl/SDL) ||| OS:Linux / Windows ||| 3 main modules in Damocles: ||| Damocles : 3D engine |||Junior : Physic and Mathematics engine ||| Unik : Network engine (Only for Windows version for the moment)
The Tylon Physics Engine is arigid body, iterative, impulse-based physics engine completely written in C#.
Tylon is a general purpose, cross-platform, physics engine.
QuantimSim is a physics simulation engine. Some aspects of astrophysics, electromagnetism, relativity, thermodynamics, statistical mechanics and quantum mechanics will be included in the simulation library.