a 2D rigid body physics engine for the web ▲● ■

2D JavaScript Physics Engine

PositionBasedDynamics is a library for the physically-based simulation of rigid bodies, deformable solids and fluids.

2 and 3-dimensional rigid body physics engine for Rust.

Position based dynamics in Unity

A 2D Soft Body and Rigid Body Physics Engine.

Integrate Bullet Physics and V-HACD into jMonkeyEngine projects (code has New BSD license)

A JNI interface to Bullet Physics and V-HACD

Lightweight 2D rigid-body physics engine

Introduction to state-of-the-art simulation methods for rigid bodies, deformable solids and fluids in the area of visual computing

Stark is a C++ and Python simulation platform for the robust simulation of rigid and deformable objects in a strongly coupled manner.

Improved version of real-time physics engine that couples FEM-based deformables and rigid body dynamics

A 2D Open Source Physics Engine in Java

A C++ 3D Game Engine. Powered by: GLFW, GLEW, OpenGL, SOIL, AmBIERA irrKlang and Bullet Physics Library

JVM bindings for Jolt Physics

Projected Overrelaxed Jacobi (JORProx) and Gauss-Seidel (SORProx) GPU implementations.

Rigid Body Dynamics with OpenMM

Granular Rigid Body Simulation Framework: efficient research tools to simulate non-smooth granular rigid body dynamics.

CAE is a tool for the simulation of rigid bodies and deformable objects.

The JBullet implementation used in jMonkeyEngine3