Game engine - Wikipedia

Godot Engine - Free and open source 2D and 3D game engine

microStudio - Game Engine

Best Game Development Engine For MMORPG

Build your own 2D Game Engine and Create Great Web Games: Using HTML5, JavaScript, and WebGL Book - EVERYONE - Skillsoft

Video Game Design and Development

Game Engine Classes Online

We are turning on a new game engine for online casino games!

Design Your First 3D Video Game With the Atmosphir Game Engine! (Ages 12 To 18) | Small Online Class for Ages 12-17

Coherence: the engine that aims to revolutionise online multiplayer indie games

MightyFingers: Online HTML5 Game Engine