On the 3D modeling and animation front,
Cheetah3D bears a simplified resemblance to 3D Studio Max but with a more modest price tag of only $99. While it doesnt have all the bells and whistles of a major software package, its still got enough of the basics to let you learn how to model from scratch and animate in 3D and it supports file formats from many of the major 3D packages, allowing you to import working files from other programs.