Absolutly astonishing! So I made a special thread! ;) Free!

Bravo to Amanda!

http://apps.amandaghassaei.com/OrigamiSimulator/

Have fun!
You can export in OBJ, STL, Fold and Import SVG/ Fold

So From Moi Use the amazing free Gravit Designer (import PDF, export SVG)
https://www.designer.io
(you must "Unfold" you Moi3D Model first : Maybe FormZ Free can help you! http://www.formz.com/products/formzfree.html ;)