A SolidWorks viewer lets you .sldprt , .sldasm , and .slddrw files without a full CAD license.
(paid, but powerful)
SOLIDWORKS Viewer is a free software application developed by Dassault Systèmes, the same company that created SOLIDWORKS. It is designed to provide a simple and intuitive way to view and interact with SOLIDWORKS files, including parts, assemblies, and drawings.