Invision - Prototyping and collaboration for design teams
Unity - The multiplatform game creation tools for everyone.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Axure RP - The prototyping and specification software used by 87% of the Fortune 100. Beyond mockups, design interactive prototypes for business solutions, websites, and applications.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.