 K-3D is the free-as-in-freedom 3D modeling, animation, and rendering  system. K-3D features a robust, object-oriented plugin architecture,  designed to scale to the needs of professional artists, and is designed  from-the-ground-up to generate motion-picture-quality animation using  RenderMan-compliant render engines. We strongly recommend the Aqsis  render engine for use with K-3D.
   
 K-3D is the free-as-in-freedom 3D modeling, animation, and rendering  system. K-3D features a robust, object-oriented plugin architecture,  designed to scale to the needs of professional artists, and is designed  from-the-ground-up to generate motion-picture-quality animation using  RenderMan-compliant render engines. We strongly recommend the Aqsis  render engine for use with K-3D.  K-3D´s innovative interactive tutorial system will introduce you to  basic use of the program. New tutorials can easily be recorded and  shared with the rest of the community.
   K-3D allows you to create and edit documents in multiple realtime OpenGL  solid, shaded, texture-mapped views. You can even model, animate, and  interact with animations while they play back for maximum productivity!