A straightforward free-download library organized across the usual categories (animals, furniture, vehicles, architecture, electronics) plus a section of V-Ray materials.
No-cost access without an obvious paywall makes it a fast first stop for a generic asset.
Reasonable for quick mockups or student work where source pedigree doesn't matter much.
Formats include .max, .obj, .fbx, .blend and .dwg; the site doesn't post blanket commercial-use terms, so check the individual model page before using anything client-facing.
5,000+ downloadable 3D models across multiple categories and file formats.