Modular (3D) and regular origami diagrams. The site isn't in English, but the 이미지 are sufficient for advanced origami folders. Definitely check out the molecules and cubes.
Amazing modular origami, where 당신 basically fold a "piece" multiple times, then put all the pieces together to create an awesomely complex-looking 3D origami module.
A good site with lots of pictures and 링그 to many other sites, including "phone diagrams" (text-only descriptions that 당신 could read/hear on the telephone).