gtk-gnutella - gtk-gnutella is a server/client for Gnutella.
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.
MyChat - Secure instant messenger for any network
WireShare - WireShare is a fork of the original LimeWire open source project.
BORGChat - BORGChat is a LAN messaging software program.