Bob's Billfolds
Gallery of dollar bill models, including a 360 degree VR of one. Illustrations with videos on how to make a catapult. Also, information on Chinese money folds.
Dollar bill Ganesh (elephant)
Diagram on how to fold an elephant with a US dollar bill.
Hecht's Web Site: Origami Stuff
Diagrams and gallery of the artist's own models, mostly of US Dollar folds. The gallery also shows some models designed by others.
Money Origami
Illustrated instructions for making several designs out of dollar bills.