1)   LanTalk XP 2.93.7445
Effective communications for the office and home environment. If you work in a busy environment and need to communicate with others in the office, or maybe even colleagues in another building, make life easy for yourself and install LanTalk XP.
LAN messenger, Net send, LanTalk, Lan Chat, LanChat, Winpop, Winpopup, Instant messenger, Message, Send,

 2)   WinPopup Gold 5.13
WinPopup Gold is a useful tool to send, receive messages and chat through your local secure network. Easy to set up and use (no server need, no ip address to setup), it enables you to point and send messages,from other active WinPopup Gold.
winpop, winpopup, winchat, lan, local, network, download, office, home, send,

 3)   WinPopup ActiveX 1.04
WinPopup ActiveX solves the problem of exchange data between your applications on the local area network (or in local computer) without any server. Simple to use, it also manages the Windows XP firewall.
winpop, winpopup, message, activex, component, ipc, interprocess, network, communication, chat,

 4)   My WinPopup Express 2005.20
WinPopup Express is a software package for writing and exchanging messages within your local network. Secure (not connected to the internet), reliable and easily accessible, this software is available for all versions of Windows...
winpop, winpopup, messenger, lan, local, network, message, send, secure, broadcast,