All about Juggling Look here for a siteswap tutorial.
Very comprehensive siteswap tutorial from Ben Beever
JugglingDB - Great site with many good links
PassingDB - The biggest database about club passing related stuff, with many videos!
The homepage of Jason Garfield. He makes maddish videos. My favourite: The ass catch.
A siteswap animator for the palm pilot
A cool juggling simulator in flash (juggling through the keyboard).
Juggling Lab - Another very good java siteswap animator

The officiall Java site from Sun
Idx3d - This is the 3d-engine I have used for Jaggle
Another good java 3d-engine