Rather then let this get lost in the other 3D printing threads thought I would post up here. Following is quoted from the website ..
netfabb Studio Basic (http://www.netfabb.com/basic.php)
Quotenetfabb Studio Basic is available to anybody, it is free just like in free beer. netfabb Studio Basic is not just a viewer, it provides mesh edit, repair and analysis capabilities to everyone already being or aspiring to become part of this fantastic, growing, creative, high-tech industry called Additive Manufacturing, Rapid Prototyping or 3D Printing.