I've been using Paper A-Frame type miniatures for my OSRIC games so far. I've made up a few sheets with Public Domain images from Clker.com, Reusable Art, A Clipart History, and the Open Clip Art Library, which I thought other people might be interested in. You can download them from here: Free Public Domain RPG Miniatures. They're scaled so that 30mm equals approximately 180cm (5'11").
To make them up just cut along the solid lines, and fold along the dotted lines. You can then glue the base tabs together, and attach them to some form of base, or you can do what I do which is just stick a paper clip on to hold them together and weigh them down. If you just go with a paper clip you can easily unfold them to pack them down flat.
I use a mixture of these and similar sized figures I make up with non-public domain sources (which fill in some of the holes with this set; like the lack of armed females), but obviously I can't share them since someone else owns the copyright on them.
For what it's worth the trivial little bit of work I did in putting these images into a document is also released into the public domain.
