Models from flexiCAD.com - Audi TT, head, USM, Gameboy.

Hardware01.zip - A .zip file containing many Rhino models of various fasteners.

Gemstones - Models of standard gemstones in mesh form, easily convertable to surfaces.

Ted Kyte Computer Service Inc. - Rhino models, some free, other formats as well, free textures.

166 Jewelry Models on PaulKrush.com - It's mostly diamond rings.

McMaster-Carr catalog - McMaster-Carr has models of a lot of their fasteners. They aren't all perfect, and some take a little rebuilding, but it's a lot better than pulling out the Machinery's Handbook and starting from scratch. Find the part you want, then once you get to the part page (with the little drawing of the part), at the top there is a download button. Select IGES and it opens right up in Rhino! –Sam Page

VirtualCAD - Free manufacturer part number interchanges in tandem with free high-detail 3D CAD models of mechanical components.

Bosch Rexroth Stuctural Framing System and Accessories catalog - Find the part you want. Press the arrow button under “CAD” and open a preview/download window. There are 29 format choices, but not 3DM. IGES works for me… always free.

Villeroy & Boch Sanitary - All kinds of sanitary items in 3DS format.

Yobi3D - 3D model search engine. Search 3D models in various format and see the search results in 3D.

CGIndia - Nice Collection of free 3DS max models and textures.

alldzine - Free 3D models in Max, Maya, Poser, C4D, and others, as well as a gallery, artwork, textures, tutorials.

RC Groups Forums - Lots of 3 views of all sorts of different airplanes. Not models but an interesting resource for someone using Rhino.