gtk-gnutella - gtk-gnutella is a server/client for Gnutella.
Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
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.