Here's a start you crybaby.
Kazaa++ is the McDonalds of p2p. Too big to ignore.
http://doa2.host.sk/
eMule is the slow but steady program with lots of content..
http://www.emule-project.net/
Soulseek has become the #1 music p2p for the esoteric music afficionados (snobs)
http://www.slsk.org/