GameDev Academy
Tutorials on Game Development, Unity, Phaser and HTML5

GODOT Game Engine
Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel. Godot is completely free and open-source under the very permissive MIT license. No strings attached, no royalties, nothing. Your game is yours, down to the last line of engine code.

Unity
Break the barriers of reality – bring new ideas to life with Unity.

Unreal Engine
Unreal Engine is the world’s most open and advanced real-time 3D creation tool. Continuously evolving to serve not only its original purpose as a state-of-the-art game engine, today it gives creators across industries the freedom and control to deliver cutting-edge content, interactive experiences, and immersive virtual worlds.

GDevelop
GDevelop is a free, open-source game engine that’s 10x easier and faster to use than anything else. Build from anywhere — even on your phone. Publish everywhere: iOS, Android, Steam, web, gaming platforms. Reach millions of players or create the next hit game you’ve been dreaming of.