Unity - The multiplatform game creation tools for everyone.
Spring Engine - Spring is a versatile 3D RTS game engine.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
PlayCanvas - PlayCanvas is an open-source game engine built on WebGL and WebVR.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Eclipse Origins - This is a free software used to create online multiplayer games for people that don't know how...