FRESHI NOW RECOMMENDED LINK: BLENDER.ORG

"Blender" is a free 3D content creation program - it allows the user to visualize, create and animate 3D video and game elements - and fully interactive environments. Unlike programs that might cause hundreds or even thousands of dollars, this program is an "open source" program; not only is it free to download, but users all over the world share plug-ins and content. The Blender.org website not only offers the program download, but a gallery of images and movies and access to a vast community to help get you started. Also, check on YouTube for literally dozens of step-by step tutorials.