Windows NetMeeting is a VoIP and multi-point videoconferencing client included in many versions of Microsoft Windows (from Windows 95 OSR2 to Windows XP). It uses the H.323 protocol for video and audio conferencing, and is interoperable with OpenH323-based clients such as Ekiga, and Internet Locator Service (ILS) as reflector. It also uses a slightly modified version of the ITU T.120 Protocol for whiteboarding, application sharing, desktop sharing, remote desktop sharing (RDS) and file transfers. The secondary Whiteboard in NetMeeting 2.1 and later utilizes the H.324 protocol. A hotfix for Vista was published by Microsoft in 2007. Users can obtain this hotfix by contacting Microsoft Support. The hotfix will allow users to install NetMeeting on Windows Vista (business versions only).
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XP -- start/run/conf
Best Network Messenger with all feature for communicating.
Text chat
Video
Voice
File Transfer
whiteboard
Desktop Sharing(Software interface sharing)
secure chat