Origami Simulator
http://www2.eng.cam.ac.uk/~sdg/preprint/5OSME.pdf
http://origami.c.u-tokyo.ac.jp/~tachi/cg/SimulationOfRigidOrigami_tachi_4OSME.pdf
https://github.com/mapbox/earcut
Built by Amanda Ghassaei as a homework assignment for Geometric Folding Algorithms.
Code available on Github.