1)   VSL LanToucher Network Messenger 1.15
LanToucher is a full-featured, Microsoft WinPopup-compatible LAN messenger for Microsoft Windows 95/98/NT4/2000/ME/XP/Server 2003. Designed as a WinPopup and "net send" replacement, LanToucher provides many more functions, options and features.

 2)   LanToucher Network Chat 1.0b3
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.