Free local network messenger software for windows

Ether Messenger is a simple TCP/IP network instant messenger Ether Messenger is a simple TCP/IP network instant messenger.
Main features:
- No server needed
- Auto distributes Nickname and Public Key
- Public Key encryption using RSA
- Broadcast to all
- Instant private chat to client
- All data encrypted
- Public Private Key Generation
- Minimise to Taskbar (auto popup on mail)
- Choose your own wallpaper
- Double click on sender to reply to past messages
- Freeform Skinnable easy to create your own
- Now on Beta
- Now with whiteboard
- File Transfer from user to user

Fire Messenger - talk to another person accross a local area network (LAN) Fire Messenger is an effective and simple tool allowing you to talk to another person accross a local area network (LAN).
Fire Messenger uses the shared folder of Windows XP by saving the message files there and constantly opening them.

Abo Sabreen Messenger is a utility designed to send and receive messages from one computer to another one or a group of computers via the local area network (LAN) under Windows NT/2000/XP/Server 2003.
Abo Sabreen Messenger uses the "NET SEND" command (Messenger Service), you can send messages to anyone, even if they dont have Abo Sabreen Messenger.
Abo Sabreen Messenger can send message after a specifying time and send message more than once.
Abo Sabreen Messenger has a new nice feature that can display all computers names on (LAN).
Abo Sabreen Messenger is free, dont hesitate to distribute it!

LNChat - Local Network Chat is the best solution for the office and home environment communications. 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 LNChat.
This Local Network Chat does not require any internet connection, and it works across Ethernet port using UDP protocol. As this module is built with peer to peer architecture, it requires no Server and IP configuration. Installing Local Network Chat is very easy, and system administrator help is not necessary. Just run the software in all the computers, and the program is ready to use. You need not add User List manually, its automatically done.
Main features:
- Automatic configuration.
- Username and IP taken automatically.
- Multiple channel administration.
- Chat in private mode.
- Just select the user to send messages.
Version restrictions:
- Limited to 3 users

Messenger is a Windows network messaging utility that enables you to send messages over the LAN.
Are you familiar with Microsoft WinPopup? Ok, never mind :)
Messenger, or CSM for short, is just another advanced program for network messaging. Send, receive, filter, autoanswer etc... Well, you know.