Windows Messenger
Windows Messenger 5.1.0706 for Windows
Microsoft
Windows Messenger allows real-time communication with other contacts who are using instant messaging (IM) services including those provided by the Session Initiation Protocol (SIP) as offered by Microsoft Office Live Communications Server. Windows Messenger also provides connectivity to the Microsoft .NET Messenger service and is the IM client of choice for businesses in managed environments.

Software Summary:

You can run Windows Messenger on Windows operating systems. Windows Messenger is a software product developed by Microsoft and it is listed in the category. Windows Messenger is a free software product and it is fully functional for an unlimited time although there may be other versions of this software product.

Alternatives in on Windows