Parti is a tiny and simple "dots-and-sticks" physics library for JavaScript.
You could also describe it as a physics simulator which uses Verlet integration to iteratively and non-conservatively solve spatial constraints on a set of particles, if you're into that sort of thing.
See the reference documentation for live examples.
To get Parti, run:
git clone https://github.com/mandykoh/parti.git parti
cd parti
make
The library will be found in the dist directory.
Parti is released under an MIT License. See LICENSE.txt for the licensing terms.