Provider of engineering collaboration software for product design, management, and development, CAD, PLM, mechanical engineering, and workflow management. http://www.cocreate.com/
Alibre Design is a low-cost parametric mechanical design application with CAD-neutral data sharing and online collaboration tools. http://www.alibre.com/
Basic and advanced tutorials on the use and customization of Autodesk Inventor 3D CAD software, discussion forums and current CAD news. http://www.sdotson.com/
A basic CAD program for creating collections of 3D elements, which can be connected by joints, constraints, actuators, springs, dampers, or forces for running motion simulations. http://www.askoh.com/