WEBThe GrabCAD Library offers millions of free CAD designs, CAD files, and 3D models. Join the GrabCAD Community today to gain access and download!
WEB3D ContentCentral ® is a free service for locating, configuring, downloading, and requesting 2D and 3D parts and assemblies, 2D blocks, library features, and macros.
WEBThingiverse - Digital Designs for Physical Objects. Download files and build them with your 3D printer, laser cutter, or CNC.