Jongl is a juggling simulation program made by Werner Riebesel and others. It is available for download at home.mnet-online.de/jongl.
You can use Jongl to make 3-D animations of siteswaps, and to generate new patterns. You can also watch solo and passing patterns from a list of over 500 patterns included with the program. Jongl can juggle lots of different kinds of objects, including balls, rings, clubs, rackets, batons, hats, chainsaws, guitars, pizzas, and flower pots. It can also do several kinds of trick throws, including flats, outside throws, backcrosses, and bouncing.