JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
Unity - The multiplatform game creation tools for everyone.
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.
Wick Editor - The Internet's free and open-source creation toolkit.
WebGL - WebGL is a JavaScript API for rendering interactive 3D computer graphics and 2D graphics within any compatible web browser.
Castle Game Engine - An open-source 3D/2D game engine for ObjectPascal.