Cyberix3D - Free online 3D Game Maker. Make your own 3D games online!
ENIGMA – LateralGM - LateralGM is a powerful IDE for ENIGMA, and both of these combine to offer you a cross-platform game environment.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.
Lobster - Lobster is a game programming language.
Unity - The multiplatform game creation tools for everyone.