Cyberix3D - Free online 3D Game Maker. Make your own 3D games online!
itch.io - An online game marketplace and community.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Castle Game Engine - An open-source 3D/2D game engine for ObjectPascal.
Origin - Origin is your new digital playground. It’s where you go to find the best that EA has to offer.