JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
Electron - Build cross platform desktop apps with web technologies
Allegro - Allegro 4 and Allegro 5 are cross-platform, libraries mainly aimed at video game and multimedia...
NW.js - nwjs
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.
DeskGap - Framework for building cross-platform desktop apps with web technologies (JavaScript, HTML and CSS).