“Bone folders” made of real bone are classic, but I prefer a plastic one. The one I use for making crisp folds in origami, for bookmaking, folding cards, and paper construction is molded to the hand for extended ergonomic use. It slides super easy with no trace on paper. Sharp point, makes a really crisp fold. Lasts forever. Inexpensive. If you work with paper, you’ll want one of these.

Submitted to Cool Tools by Kevin Kelly