| BRL-CAD |
a powerful Constructive Solid Geometry (CSG) solid modeling system |
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| FreeCAD |
a general purpose 3D CAD modeller |
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| Moonlight 3D |
a free modern, flexible, feature-rich and extensible modelling and animation tool |
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| VariCAD |
3D/2D CAD system for mechanical engineering |
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| VARKON |
a free CAD system and high level development tool for Engineering |
