The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer....
a 2D rigid body physics engine for the web ▲● ■
A positioning engine to make overlays, tooltips and dropdowns better
Desktop runtime for apps built on web technologies, using the system's own web browser engine
Egret is a brand new open mobile game and application engine which allows you to quickly build mobile games and apps on Android,iOS and Windows....
:video_game: GDevelop is an open-source, cross-platform game engine designed to be used by everyone.