Cassini at Saturn Interactive Explorer (CASSIE) version 2
 

http://saturn.jpl.nasa.gov/multimedi...E/cassini.html
If this is the first time you've tried CASSIE, when you click on the button below it will automatically download and install the needed software (a free plug-in to your web-browser) and real Cassini mission data. The initial download is about 9 megabytes so it should only take a minute or two. (If you use a Mac you may need to install the software after it downloads and then restart your web-browser.) Once the plug-in is installed and the mission data is loaded, you're ready for your trip to the Saturn System.

http://saturn.jpl.nasa.gov/multimedia/CASSIE/