Peer to peer Office Instant Messaging. Free upgrades.
License: Shareware
OS Support: Win95,Win98,WinME,WinNT 4.x,Windows2000,WinXP,Windows2003

tekAlign's ReachPlus Alerts is used to send instant safety alerts
License: Demo
OS Support: Win98,WinME,WinNT 4.x,Windows2000,WinXP

Akeni Enterprise Instant Messaging IM with LDAP
License: Demo
OS Support: Windows2000,WinXP,Linux

Programmable Instant Messaging Platform based on XMPP/Jabber running on Windows
License: Commercial
OS Support: Windows2000,WinXP,Windows2003

Secure, Simple, Instant Messaging For Office LAN. 1-Click Replies & Much More!!
License: Shareware
OS Support: Win98,WinME,WinNT 3.x,WinNT 4.x,Windows2000,WinXP

AliveChat allows you to connect with your web site visitors via browser chat.
License: Shareware
OS Support: WinME,WinNT 3.x,WinNT 4.x,Windows2000,WinXP,Windows2003

Sending messages in computers networks.
License: Freeware
OS Support: Win98,WinME,WinNT 4.x,Windows2000,WinXP,Windows2003,Windows Vista Starter,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Business,Windows Vista Enterprise,Windows Vista Ultimate,Windows Vista Home Basic x64,Windows Vista Home Premium x6

Stream/Play videos on Yahoo/MSN messenger webcam without having a webcam
License: Shareware
OS Support: Win98,WinME,WinXP,Windows2000,Windows2003,Windows Tablet PC Edition 2005,Windows Media Center Edition 2005,Windows Vista Starter,Windows Vista Home Basic,Windows Vista Home Premium,Windows Vista Business,Windows Vista Enterprise,Windows Vista Ultimate,Win

Akeni Help Desk Assistant can be used with Akeni Enterprise Instant Messaging IM
License: Demo
OS Support: Windows2000,WinXP,Windows2003,Linux

Akeni Live Help 123 for Corporate Instant Messaging ,Live help andlive support,
License: Demo
OS Support: Win95,Win98,WinME,WinNT 4.x,Windows2000,WinXP,Linux