3D - 2

What is some good 3D prototyping,concept modeling, CAD software?

I have an idea for an invention, I need software to make a 3D model or animation of the idea. What is some good software?

Public Comments

1. Google Sketchup http://sketchup.google.com/
2. oraclequestionanswer at http://oraclequestionanswer.blogspot.com/
3. T-FLEX: http://www.caddit.net/plm-software/t-flex.php