FreeCAD - An Open Source parametric 3D CAD modeler

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FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. FreeCAD is based on OpenCASCADE, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API.

http://www.freecadweb.org
http://sourceforge.net/projects/free-cad
https://github.com/FreeCAD/FreeCAD

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