[design] geometrical patterns

i've been researching a geometrical device called
Fractiles-7 which allows building tessellations
and other patterns, during which i located some
links others may also find of interest. brian
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Islamic art and tilings
http://www.counton.org/explorer/morphing/07islamictilings.shtml

Tilings from Historical Sources // **
http://www2.spsu.edu/math/tile/grammar/index.htm

A 13th Century Arab design // ***
http://www2.spsu.edu/math/tile/historical/arab/arab1.htm

A collection of patterns with symmetry type p4m
http://www2.spsu.edu/math/tile/symm/types/p4m/p4m.htm

Tessellating Alphabet 1986 // click on letters...
http://www.scottkim.com/inversions/gallery/tessellatingalphabet.html

Investigating Patterns: Symmetry and Tessellations // links
http://ccins.camosun.bc.ca/~jbritton/jbsymteslk.htm

Fractiles, Inc. // tiling set
http://www.fractiles.com/