This new article I wrote might be of interest or use. JigSpace comes from some
smart folks in Australia.
http://www.techsoupforlibraries.org/jigspace-a-new-free-application-for-making-3d-presentations
Please make sure you install Inkscape and Blender (both free and open source)
on refurbished
computers that are heading out into the community. And ask your local public
libraries if they might
install JigSpace software on their public computers.
Phil