Unity - The multiplatform game creation tools for everyone.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Intrinsic - Intrinsic is a Vulkan based cross-platform graphics and game engine.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Superpowers - Superpowers is an HTML5 development environment for making 2D and 3D games.