Austrian Footbag Association presented on this computer game-like site. Interesting design. No English version.
With 955 described tricks this is most comprehensive list on the web. Unfortunately it is far from flawless.
A very interesting record list displaying all the great players hitting as many of the well known tricks as possible. Try to beat the record of 20 PS Whirls or 4 Montages in a row.
This site has one interesting feature. Try the best shred computer game on the internet - Shred Session.