I think FreeCAD is a great ability to derive 3D models of Moi3D in 2 D drawings.

Mediawiki link: http://sourceforge.net/apps/mediawiki/free-cad/index.php?title=Main_Page

[...]
FreeCAD is a general purpose 3D CAD modeler.
The development is completely Open Source (GPL & LGPL License).
FreeCAD is aimed directly at mechanical engineering and product design,
but also fits in a wider range of uses around engineering,
such as architecture or other engineering specialties.
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Import:
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Export:
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