https://github.com/typesense/typesense
http://platesphp.com/engine/
https://famous.org/
http://brm.io/matter-js-demo/
https://github.com/bebraw/jswiki/wiki/Game-Engines
http://www.kuwata-lab.com/support/2007/11/04/10-lines-implementation-of-php-template-engine/
http://www.sphider.eu/