KaZaA Lite is a FastTrack Client. This is cleaned version of Kazaa.
Kazaa Download Studio is a Kazaa Media Desktop (including Kazaa 3.0) add-on that includes a slew of features to boost your P2P experience. Included features consist of File Manager, an MP3 scanner, a File Indexer, Internet Booster, lyrics and more!
Kazaa Lite Revolution is a new FastTrack Client. This is cleaned version of Kazaa Media Desktop. The main difference is that Kazaa Lite has been modified so that it does not have any of the spyware.