- Math Pages Over 300 articles on a variety of mathematical topics. Very nice!
- Knot a Braid of Links: A Guide to Mathematics on the Web
- CaMEl: The electronic service of the Canadian Mathematical Society
- The Math Forum
- MegaMath
- Interactive Mathematics Miscellany and Puzzles
- MathPro Press Web Pages
- The Spanky Fractal Database
- The Geometry Junkyard
- Mathematical Quotation Server
- Mathematics on Canada's SchoolNet

- Brain Teasers & Math Puzzles
- The Brain Exercizer - Mathematical Riddles
- Ken Duisenberg's Puzzle of the Week
- The MathSoft Math Puzzle Page
- The rec.puzzles Archive

Ambigrams: the symmetrical wordplay of Scott Kim and Ambigram.com

Two pages of celtic knots with instructions for drawing them:

The art of M. C. Escher

The mathematical sculptures of Helaman
Ferguson and a book of his work.

Origami and mathematics:

Origami & Math

Thomas Hull's Origami Mathematics Page

Helena Verrill's Origami Index Page

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