HEATKEYS

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

Engineers Edge - Total Design, Engineering & Manufacturing Resouces

covering the most interesting product design, design process, tools and related technology in 3D product development.

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

The largest resource for MCAD (Mechanical Computer-Aided Design) professionals, including files, forums, jobs, articles, calendar, and more.

Craftsmanspace contains free woodworking and metalworking DIY (do it yourself) project plans and patterns with detailed manufacture and assemblage descrfiption.

Find tens of thousends of printable 3D Models worldwide! We collect 3D Models from all Plattforms and Communities for 3D Printing.

SolidView allows non-CAD users to view, measure, and markup CAD data. Receive a 15-day free trial with access to all CAD interfaces.

Zygote creates the world?s premier 3D human anatomy collections for medical animation and illustration, and creates Anatomy-related software products.

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

Aipos3D is a friendly search engine for printable 3D models and STL files.