PTC has a free parametric solid modeler:
http://www.ptc.com/products/creo-elements-direct/modeling-express/
It is a parametric modeler:
Changing the dimension in the box changes the model. The dimension can be changed later:
Creo exports a "vmrl" which will import into Blender and Crafter where it can be textured:
I use PTC's Pro-Engineer for modeling and after a few minutes Creo looks like it is really good for modeling.
Hope that helps someone
Harold
http://www.ptc.com/products/creo-elements-direct/modeling-express/

It is a parametric modeler:

Changing the dimension in the box changes the model. The dimension can be changed later:

Creo exports a "vmrl" which will import into Blender and Crafter where it can be textured:


I use PTC's Pro-Engineer for modeling and after a few minutes Creo looks like it is really good for modeling.
Hope that helps someone
Harold