Blender

Blender screenshots

Blender is a free and open source 3D animation suite

Alternative downloads

Saola Animate
Create HTML5 animations and interactive web contents.
1.0.3
ADA3D STL Viewer
Free program that helps you visualize STL or OBJ meshes.
1.4.0
FREE
Maxwell Render
A rendering engine based on the mathematical equations governing light transport.
2.6.0.0