Urho3D - Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released...
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
ApertusVR - VR Game Engine
BYOND - BYOND is the premier community for making and playing online multiplayer games.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
SpriteKit - SpriteKit makes it easy to create high-performance, power-efficient 2D games on Apple platforms.