Vypress Messenger is a real-time messaging system specifically designed for business Intranets.
Using a peer-to-peer architecture, it delivers text messages from workstation to workstation in real-time, without the typical delay associated with conventional e-mail, and absolutely safe with high-grade encryption and digital signatures.
Free trial for Windows 95, 98, Me, NT 4.0, 2000, XP and 2003. Supported protocols TCP/IP.