HEATKEYS

GrabCAD - a free CAD model library with 2D / 3D CAD files available for software like SolidWorks, AutoCAD, Autodesk Inventor, Solid Edge, SketchUp etc.

Empowering anyone to create and publish 3D online through our 3D platform of community, 3D content, and free 3D software.

3D models for CAD/CAM/CAE designers. Cars, cities, airplanes and other polygonal and NURBS/SOLID models.

YouTube is a place to discover, watch, upload and share videos.

CR4 - The Engineer

CADTutor provides free video tutorials, articles, downloads and a busy community forum for users of AutoCAD and associated software.

Find free downloads for supplier parts models, component models, 3D parametric models and supplier component downloads, including free CAD drawings, assembly models and full 3D CAD models. Use these free part models by dropping them directly into yo...

wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual. Our multilingual how to manual has free step-by-step instructions on how to do all types of things.

Offers 3D models, clip art and 3D animation of the Male and Female Anatomy for enhanced scientific visualization.

Instructables is the Biggest How To and DIY community where people make and share inspiring, entertaining, and useful projects, recipes, and hacks.

3d models - Buy and sell. The3dStudio.com is one of the largest royalty free 3D resource sites on the Internet. Buy, sell, and trade 3D Models, Stock Photos, Stock Images, Textures, Tutorials, and more for 3ds max, 3d studio max, Cinema 4D, Maya, Lig...