1)   Invisible Chat 1.22
Invisible Chat is a software for communication by LAN .You can make it "invisible" for prying eyes, when undesirable person is staying behind. You can change transparency, form, color, font and other parameters.
messenger, chat, communication, assistant, windows software, lan, talk, contact, instant send, local network,

 2)   NetChat 2.6
NetChat is a peer-to-peer local network messaging and communications system for Windows which does not require a server to be running for use. It allows you to chat in real-time with other users on a secure and private local network connection.
chat, local network, instant messaging, communications, utility, tool, collaboration, chat communication,

 3)   IntraMail 2003.01.20
Secure exchange of messages in a local network Intranet (Windows 95, 98, Me, NT, 2000, XP). The mail can be written or read from any PC easily. Every mail-account can be protected by a password. Personal messages are strongly encrypted.
Security, mail, messages, local network, LAN, WAN, CHAT, encryption,