Free 3D converting and viewing software
Autodesk Viewer. The Autodesk online viewer supports most 2D and 3D formats, including DWG, STEP, RVT and SolidWorks
GrabCAD Join 4,840,000 engineers with over 2,860,000 free CAD files
SketchFab Publish, share and discover 3D content on web, mobile, AR and VR. Get free PRO account using our
link
Friendly resources
3Dmap.World. Relief map 3D models of any place of the Earth. OBJ, STL, FBX file formats available
SolidHumans.xyz. Realistic CAD compatible human models Solid and NURBS geometry (STEP, IGES, X_T file formats)