Form 2 - The most advanced desktop 3d printer ever created
Unity - The multiplatform game creation tools for everyone.
3D Hubs - Airbnb for 3D printing
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Zazzy - Design and sell your own 3D printed jewelry
AndEngine - AndEngine is a free android 2D OpenGL game engine.