1)   LanToucher Network Chat 1.0RC
LanToucher Network Chat is small and easy-to-use chat software for your small office or home LAN (Local Area Network). Serverless (P2P) messaging; No dedicated server or Internet connection is required.
chat messenger, lan chat, network chat, intranet chat, instant chat, winpopup, messenger service, net send, IM, EIM,

 2)   BigAnt Business IM Pro 2.52
BigAnt Business IM Pro is a secure and private instant messaging solution for enterprise-level communication.
LAN messenger, LAN transfer, instant messenger, intranet messenger, im server, net send,