Planck.js

A simple Verlet (pronounced 'ver-ley') physics engine written in javascript.

The threejs.org website presents Three.js, a lightweight and popular JavaScript library that makes creating and rendering 3D graphics in web browsers simple by using WebGL technology.

Interactive 3D sketches and creative experiments.

Effortlessly create 3D web experiences, from quick demos to advanced applications, with Three.js.

Physijs brings a very easy to use interface to the three.js framework.

Oimo.js is a lightweight 3d physics engine for JavaScript.