Goto: http://www.rhino3d.com/

Follow the link to Try Rhino, you will find the download there.

Remember: You only get 25 saves until the save your workcapability is disabled. So, unless you really must save leave Rhino run and keep your computer on. It will take just a bit to get used to it. There is a new user at Rhino forum here, she copleted a whole duck using the tutorials included in Rhino Help FIles/b> found in the program and getting pointers over at thr Rhino forum.

If you have any troubles, go to the Rhino forum here and I or someone else will answer your questions.

Yank My Doodle, It's a Dandy!