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Translate Google SketchUp, Rhino 3DM, STEP, IGES, JT files to 3DS, OBJ, XAML & PDF file formats

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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.

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An online center for Computational Fluid Dynamics. Services include a comprehensive link section, a jobs database, a CFD-Wiki, and a discussion forum. This is the largest CFD site on the net.

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Glovius is a free JT viewer for Windows. Using the CAD addons , import Solidworks, STEP, Catia,IGES, ProE files.View 3D files in iPad,iPhone and Android devices

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Downloadatoz.com offers complete common file extensions list with detailed information about each file extensions and the programs that open the file format.

Comprehensive information on rapid prototyping, rapid tooling, sterolithography and solid freeform fabrication technology products and services. Complete rapid prototyping service bureau listings.