Computer physics engines

Unigine is a proprietary cross-platform game engine, developed by Russian software company Unigine Corp.

Box2D is a free open source 2-dimensional physics simulator engine written in C++ by Erin Catto and published under the zlib license.

A physics engine is computer software that provides an approximate simulation of certain physical systems, such as rigid body dynamics (including collision detection), soft body dynamics, and fluid dynamics, of use in the domains of computer graphics, video games and film.

PhysX is a proprietary realtime physics engine middleware SDK.

RealFlow is a fluid and dynamics simulation tool for the 3D and visual effects industry, developed by Next Limit Technologies in Madrid, Spain.

Euphoria is a game animation engine created by NaturalMotion based on Dynamic Motion Synthesis, NaturalMotion's proprietary technology for animating 3D characters on-the-fly "based on a full simulation of the 3D character, including body, muscles and motor nervous system".

Phun is a 2D physics engine created by Emil Ernerfeldt for his master thesis while he was studying at Umeå University in Sweden.

The Open Dynamics Engine (ODE) is a physics engine written in C/C++.

The Tokamak Game Physics SDK is an open-source physics engine.

Digital Molecular Matter, better known as simply DMM, is a proprietary middleware physics engine developed by Pixelux for generating realistic destruction and deformation effects.

Bullet is a physics engine which simulates collision detection, soft and rigid body dynamics.

Newton Game Dynamics is an open source physics engine for realistically simulating rigid bodies in games and other real-time applications.

CUDA is a parallel computing platform and application programming interface (API) model created by Nvidia.

Havok is a middleware software suite developed by the Irish company Havok.

Project Chrono is a platform-independent, open source physics-based modelling and simulation infrastructure.

Vortex is a complete simulation software suite.

Algodoo is a physics-based 2D sandbox developed and sold by Algoryx Simulation AB, and is the successor to the popular physics application Phun.

Algoryx Simulation AB was formed in 2007 in Umeå, Sweden as a spin-off company from Umeå University.

OE-Cake, OE-CAKE! or OE Cake is a 2D fluid physics sandbox which was used to demonstrate the Octave Engine fluid physics simulator created by Prometech Software Inc.

The Open Physics Abstraction Layer (OPAL) is an open source realtime physics engine API similar to PAL.

The Physics Abstraction Layer (PAL) is an open source cross-platform physical simulation API abstraction system.

Phyz (Dax Phyz) is a public domain, 2.

Chipmunk2D is a 2-dimensional real-time rigid body physics engine written by Scott Lembcke that is designed to be portable, lightweight, fast, and easy to use.

AGX Multiphysics (now renamed to AGX Dynamics) is a proprietary real-time physics engine developed by Algoryx Simulation AB that simulates rigid body dynamics, collision detection, dry frictional contacts, jointed systems, motors, fluids, deformable materials, hydraulics, hydrodynamics, cable systems and wires.