From what I've heard.. Kazaa lite is free of spyware. However, last I heard it wasn't officially downloadable, so you'd get it from a third source.. which THAT is always subject to inserting their own viruses and all.
Really, the best thing to do is avoid file sharing all together.. Techspot doesn't officially support illegal file transfers yada yada, but why risk the trouble these days? Know your source!
btw- Welcome to Techspot!