here are choices
Kazaa
Kazaa LiTE
Ares
Freenet
Shareaza
Bittorrent
Emule
Edonkey
Imesh
Overnet
Soulseek
Piolet
Blubster
RockitNet
DC++
DirectConnect
Gnucleus
XoloX
Limewire
Bearshare
Morpheus
WinMx
Grokster
IRC clients
Waste
Phex
Napster (before)
Napshare
Blubster
GLT Polaine
Audio Galaxy
Foldershare
URL Blaze
Songspy
Frost
Filetopia
If i didnt metion a client i am sorry about not being superpowerful all knowing master of the universe thank you :)
My favorite so far is KaZaA LiTe cause it gives me the fastest speeds with 56k sigh...... lol what do u think is the best one out there