Engines and their tools
Commercial Game Engines
Free Game Engines
Godot Engine is a feature-packed, cross-platform game engine to create 2D and 3D games from a unified interface.
The Blender Game Engine (BGE) is Blender’s tool for real time projects, from architectural visualizations and simulations to games.
GDevelop is an open source, cross-platform game creator designed to be used by everyone - no programming skills required.
Cocos2d-x is a suite of open-source, cross-platform, game-development tools used by millions of developers all over the world.