1)   x Chat Free 2.9
x Chat Fre is a private one-to-one chat program for Intranet. It is user-friendly, drag and drop support and fully customizable. It comes with colourful text chat, file transfer, drawing board, network tools and encryption security features.
Network Chat, Network Utilities, Text Chat,

 2)   VaxVoice Extended SDK 4.0
Vax Voice activeX is the easiest way to add PC-to-PC multiuser voice chat and text chat in your applications and webpages. Three or more persons can have a real time voice conference and can even record the conversation into wave (.wav) file.
voip, voip activex, voice conference, voip sdk, voip components, voip controls, text chat, voip chat, voip com, voip ocx,

 3)   Utility Phone 1.5
FREE Worldwide PC-to-PC communications using: voice, video, online/offline text messaging, text chat and file transfer, all secured using AES 256 bit encryption. Other features include activity notifications and privacy mode.
voip, V.O.I.P., voice, text chat, messaging, instant messaging, offline messaging, video, video conferencing, secure,