Secure Network Chat 

Secure Network Chat (SNC) - is a text chat able to solve all the problems in communication between your company staff members cardinally. SNC is especially designed to work with medium and large local area networks
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VueChat Enterprise Server 

VueChat is a Customer Service software for the Government and Corporations, web based, featured with live video chat, VoIP and Customer Relationship Management (CRM) functions.
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IM-Snif 

IM-Snif allows a system administrator to view and log all Instant Messages passing through a LAN, including popular networks such as MSN Messenger, AOL Instant Messenger and ICQ Messenger. Internet Relay Chat and plain email are also supported.
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IceChat IRC Client 

IceChat can connect to many IRC Servers, has full scripting support and customizable popup menus, and a unique, easy to use Interface.
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Shareaza Lite 

Shareaza Lite is a new improved and completely FREE client for Gnutella, Gnutella2 (G2), eDonkey2000 and BitTorrent P2P networks. It has great user interface with built-in chat and media player and uses swarming technology for fastest downloads.
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NetChat 

NetChat is a peer-to-peer local network messaging and communications system for Windows which does not require a server to be running for use. It allows you to chat in real-time with other users on a secure and private local network connection.
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