jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Paper.js is an open-source, vector graphics scripting framework, which offers a powerful Scene Graph and extensive functionality to create and manipulate graphic items using layers, gradients, blending, and other advanced features
Tengine is a web server which is based on the Nginx HTTP server.