Tools for developing and building simulations.
By PhET Interactive Simulations http://phet.colorado.edu/
The PhET Development Overview is the most complete guide to PhET Simulation Development. This guide includes how to obtain simulation code and its dependencies, notes about architecture & design, how to test and build the sims, as well as other important information.
npm install -g qunit, then qunit in chipper's directory to run the unit tests.
See the license.