gnutella
Knowbuddy's
Gnutella FAQ
openp2p.com
Gnutella/0.4
protocol
gnutellaNet
protocol
Independence
Array
p2p & web services
conference
freshmeat.net lists 20 projects:
Active Gnutella Servers
http://www.gnutelliums.com/linux_unix/
Morpheus-KaZaA (FastTrack)
Morpheus
Out of the Underworld
giFT (open-source FastTrack client)