Know any open source tools for parametric design of origami folds and origami based objects?

I want to design origami folds parametrically. The best tool I could find is an architectural design software named Rhino3D. The tool is perfect, but is as expensive as it is good.

The best open source alternative I know is FreeCAD. I have used FreeCAD for parametric design of solids, but I don’t find it well suited to model folds in sheets of paper. I couldn’t figure out how to, even if its possible at all.

Any suggestions?

I found this on thingiverse, apparently someone tried openscad:

Thanks @Matheus. I am still not sure if I can do what I have in mind on OpenSCAD but the tool seems cool. I am certainly trying it out.