Godot Engine - Feature-packed 2D and 3D open source game engine.
Adventure Game Studio - Adventure Game Studio provides the tools to make your own adventure, for free!
FPS Creator Classic - We specialise in game creation tools for a range of devices such as Windows, iOS, Android. With game making tools like GameGuru, AppGameKit, FPS Creator and Dark Basic Professional you can make all types of games.
Cocos Creator - Cocos Creator is more than a efficient, lightweight, free, open-source, cross-platform graphics engine: it's also a platform to create 3D content in real time.
ENIGMA – LateralGM - LateralGM is a powerful IDE for ENIGMA, and both of these combine to offer you a cross-platform game environment.
Stride Game Engine - Stride is an open-source 3D Game Engine written in C# and released under the MIT License that allows you to build powerful game worlds for free or to generate income.