Physics libraries

2D

• box2dweb - port of Box2D to JS
• Chipmunk-js - a port of Chipmunk to JS
• CoffeePhysics - lightweight physics engine written in CoffeeScript
• JPE - physics engine based on Alec Cove's APE
• Verlet-js - A simple Verlet physics engine written in javascript.
• PhysicsJS - A modular, extendable, and easy-to-use physics engine for javascript
• p2.js - 2d physics engine by the creator of cannon.js
• Matter-js - a 2d rigid body physics engine for the web
• Planck.js - JavaScript rewrite of Box2D with a JavaScript-friendly API
• BallPhysics - An easy easy to use 2D physics engine for JavaScript, still under development

Also

• https://github.com/thinkpixellab/box2d/ - Closure-Compiler based port of Box2D to JS
• https://github.com/Moerphy/Chipmunk.js - older port of Chipmunk to JS
• http://github.com/hapticdata/toxiclibsjs - port of Toxiclibs' VerletPhysics to JS
• https://github.com/ChristophPacher/JavaScript-Physics-Library

3D

• JigLibJS - port of JigLib to JS
• ammo.js - port of Bullet to JS
• bulletjs - port of parts of the Java library JBullet(http://jbullet.advel.cz/)
• cannon.js
• microphysics.js - simple 3D physics engine
• Physijs - plugin for Three.js
• Oimo.js Lightweight 3d physics engine
• Goblin Physics - full physics engine specifically for JavaScript

Other

• http://dev.opera.com/articles/view/blob-sallad-canvas-tag-and-javascrip/
• http://cvslab.di.unipi.it/blogs/simula/
• http://granular.cs.umu.se/browserphysics/