Mathematical Origami
- Origami models and techniques with strong mathematical precepts.
- http://www.mat.unb.br/~lucero/orig_e.html

nuwen.net - Origami Polyhedra
- Illustrated directions for making four types of polyhedra.
- http://nuwen.net/poly.html

Helena's Origami
- Modular origami and tessellations by Dr. Helena A. Verrill. Instructions included.
- http://www.math.lsu.edu/~verrill/origami/

Origami Tessellations
- Blog by Eric Gjerde featuring tessellations, crease patterns, tessellation geometry, origami mathematics and paper folding in general.
- http://www.origamitessellations.com

Thoki Yenn's Cuboctahedron Folding Companion
- Step-by-step photo instructions for Thoki Yenn's 3D cuboctahedron origami model.
- http://deity.co.nz/cuboctahedron/

Meenakshi's Modular Mania
- Image Galleries of original modular models as well as picture links to other designs.
- http://home.comcast.net/~meenaks/origami/

Origami Mathematics
- Mathematics of paper folding; includes a bibliography of articles and journals, Combinatorial geometry syllabus, and a tutorial on geometric constructions. Photo gallery of completed modular, geometric, and tessellation models.
- http://www.merrimack.edu/~thull/OrigamiMath.html

Tom's Origami Gallery
- Personal gallery of modular and tessellation models.
- http://www.merrimack.edu/~thull/gallery/modgallery.html

Modular Origami
- Images of modular origami models folded by Michał Kosmulski. Model categories include: fractals and IFS, interesting mathematical objects, polyhedra and balls, spiked balls and stars.
- http://hektor.umcs.lublin.pl/~mikosmul/origami/

Teaching Mathematical Thinking Through Origami
- Suggestions for using origami to teach concepts in mathematics, with diagrams of models.
- http://rachel.ns.purchase.edu/~Jeanine/origami/

Krystyna Burczyk's Origami
- Photos of regular polyhedra models.
- http://www1.zetosa.com.pl/~burczyk/origami/galery1-en.htm

Geometry Junkyard: Origami
- Resource listing of links for information about the relationship between origami and geometry.
- http://www.ics.uci.edu/~eppstein/junkyard/origami.html

Jim Plank's Origami: Modular
- Diagrams and gallery of many geometric models.
- http://www.cs.utk.edu/~plank/plank/pics/origami/origami.html