Juggling
General information about juggling.
Free juggling software
Jongl (no Mac version)
Information about the mathematics of juggling
Siteswap FAQ. All most people will ever need to know about juggling sequences.
The Mathematics of Juggling My fairly mathematical account of all known aspects of juggling mathematics.
Origami
Tom Hull's Origami Mathematics page
Map Folding Download Tom's paper: In search of a practical map fold.