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

Product Design Forums is the community, blog & resources site, where industrial designers from all over the world come together to socialize and to create, share and find useful resources.

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

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

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

archinoah.com is a architecture network for architects, interior architects, urban planners, engineers and students of these branches.

CAD Blocks FREE! Download FREE CAD Blocks from a variety of categories and CAD disciplines. Browse before you download as all of our CAD Blocks have detailed thumnail views!

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Cadyou is a free resouce for creative commons licensed 3D Models, CAD Blocks and Textures