Unity - The multiplatform game creation tools for everyone.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Struckd - 3D Game Creator - Struckd is the next-generation gaming platform for user created content where people of all ages...
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
Reality Factory - Reality Factory is a free suite of game development tools for building 3D games.
ZBrush - ZBrush is a digital sculpting and painting software solution.