The Origami Forum

Hey,
Does anyone know of any good origami diagrams that are available online or for free? (I won't be buying a book for a while)
I haven't been doing origami for a while now but would like to restart, but I can't seem to find any that are a bit challenging. I would like to do something that is intermediate-complex!
Thanks

Look through here, if you haven't already. There are some really great diagrams available.