Secure instant messaging system for team collaboration
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
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.
Bopup IM Suite - Organize secure messaging system and communicate instantly via self-hosted IM server.
WireShare - WireShare is a fork of the original LimeWire open source project.