Messenger Lan
- Instant messaging program for local area networks.
- http://messengerlan.com

LanToucher Network Messenger
- WinPopup compatible communication utility used in LAN.
- http://www.vitalsoundlab.com

Bantu Inc.
- Server software with proprietary directory technology and enterprise integration capabilities.
- http://www.bantu.com/

12Planet
- Commercial instant messaging server software and components for providing online communication services. Includes whiteboarding and voice video capabilities.
- http://www.12planet.com/

MeetGate
- MeetGate allows instant secure communication and exchange of information between PCs connected to a private or public network.
- http://www.meetgate.com

Communicator Inc
- Communicator Inc provides identity-based communication solutions for business, government and the extended enterprise.
- http://www.communicatorinc.com

Hubbub Instant Messenger & Presence Application
- Hubbub is an Instant Messenger that makes use of various song snippets to give you an awareness of your friends and colleagues.
- http://www.hubbubme.com/

IMIRC
- A gateway between AOL Instant Messenger (AIM) and IRC (Internet Relay Chat). Requires an IRCd installation.
- http://www.zevils.com/programs/imirc/

QuickPopUp
- Allows users to exchange instant messages with other users on a LAN and across multiple operating systems.
- http://www.quickpopup.com/

Invertix
- Interoperable wireless messaging platform for wireless carriers and mobile content providers (Palm OS, PC, WAP and Web).
- http://www.invertix.com

Instant Messaging Age Software Inc.
- Provides capabilities that corporations use to turn simple IM communication platforms into productive and secure business tools
- http://www.im-age.com/

DataMate Global Communications
- Secure corporate instant messaging solutions offering customizable features such as fast responses and automatic replies. Suitable for the small office to the large organization
- http://www.data-mate.com/

WiredRed Software
- Provider of e/pop, an enterprise-ready suite of real time communications and instant messaging software for small to large sized businesses.
- http://www.wiredred.com

NetLert Communications Inc
- Offers secure, real-time communication software solution providing Instant Messaging for enterprise use.
- http://netlert.com