Terraria - Dig, Fight, Build! The very world is at your fingertips as you fight for survival, fortune, and glory.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
SimPhy - Interactive 2D & 3D Physics simulation software
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
Physion - Physics Simulation Sandbox
ZBrush - ZBrush is a digital sculpting and painting software solution.