Paper.js - Open source vector graphics scripting framework that runs on top of the HTML5 Canvas.
JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
p5.js - JS library for creating graphic and interactive experiences
Allegro - Allegro 4 and Allegro 5 are cross-platform, libraries mainly aimed at video game and multimedia...
Three.js - A JavaScript 3D library which makes WebGL simpler.
Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.