MSN Messenger is an Instant Messenger utility with several additional applications that hook into the Windows operating system. These include video conferencing, whiteboard and remote desktop assistance.
Licence: Freeware. Online: http://www.microsoft.com/windows/messenger/ Operating system: Windows 98, Me, 2000, XP. Requires: Internet Explorer 5.01 must be installed, but doesn't have to be the default browser.