Links
Fractal Software
UltrafractalThe software I use to make my images.
Kleinian groups
Indra's PearlsThe website maintained by Prof. David Wright of Oklahoma State University, one of the authors of "Indra's Pearls, The vision of Felix Klein."
Space-filling packings
Prof. Hans Herrmann's pageWhere I got inspiration for sphere packings and "strip geometry".
Bowl of integersWebsite (in French) by Nicolas Hannachi on sphere packings with spheres of integer curvature.
Mathematical art
Mathematical imagery at the American Mathematical Society.Mathematicians and artists continue to create stunning works in all media and to explore the visualization of mathematics--origami, computer-generated landscapes, tesselations, fractals, anamorphic art, and more.
Optical illusions
An optical illusionOptical illusions blog by Brad Honeycutt.
Other
The History of MeasurementsA short history of measurements, by Tiffany Chambers.