| Traceparts | Probably the largest 3D content library with hundreds of suppliers catalogues and my first goto place for suppliers content. All major suppliers can be found here. Practically all content is supplied in neutral format (STEP). |
| Part community | Large 3D content library with hundreds of suppliers catalogues and my second goto place for suppliers content. All major suppliers can be found here just like on Traceparts, but there are some suppliers that can only be found on Part community. Practically all content is supplied in neutral format (STEP). |
| 3D contentcentral | Dassaults (Solidworks) portal for 3D content. All major suppliers can be found here just like Traceparts, but there is also lots of user generated content. Content is supplied in both neutral (STEP) and/or native (Autodesk, Dassault, Siemens) format |
| Grabcad | Large community driven content library. All content is supplied by community members and not by suppliers. Content is supplied in both neutral (STEP) and/or native (Autodesk, Dassault, Siemens) format depending on the system the community member uses. |