Instant Messaging & Presence    

Abbeynet - Praesentia is an advanced SIP/SIMPLE application server that quickly enables legacy architectures to offer a wide range of new value-added services for Internet and mobile phone users.
Active Voice; LLC - Active Voice's Repartee® LX unified messaging w/ SIP system brings you the power of centralized message control by allowing you to manage your communications over the telephone or from the PC
Antepo - Built on a multi-protocol XMPP/Jabber and SIP/SIMPLE routing engine, the OPN System enables standards-based Presence aggregation and federation across enterprise, provider, and firewall boundaries.
Colibria AS - Colibria Instant Messaging and Presence servers are breaking technology boundaries to bring both OMA IMPS and SIP/SIMPLE solutions to wireless operators. Standards compliance the hallmark of Colibria
Critical Path - IM (instant messaging) application for wireless carriers and service providers.
EarthLink - SIP based VoIP and IM client. Free on-net calling. Download includes 30 free PSTN domestic minutes.
Ecrio Inc - Instant Messaging and Presence Services (IMPS) handset software and communication servers
Eyeball Networks - Standards based IM Server (SIP Standards RFC 3261; 3665; 2617; 3428 and 3263). IM Server delivers scalable Presence and instant messaging. Includes federated IM with AOL; Google; MSN and Yahoo.
Icecom Ltd. - Icecom LiveEngine is a desktop component that provides VoIP, Instant Messaging and presence client for any web application or portal as well as for a native Windows application.  Icecom PresenceEngine is a J2EE architecture based server what follows SIP SIMPLE standards.

Inter-Tel Presence Management Applications
 
Inter-Tel Presence Management Applications that define how, when, where and which devices users wish to communicate. These tools allow others to gain visibility into a user’s situation to gain instant awareness of key information, such as availability and location. Additionally, Presence tools facilitate communication between individuals and groups; customers; clients and vendors—who may be geographically dispersed. Inter-Tel Presence Management solutions bridge this gap between the enterprise and its resources so communications can occur in a more streamlined manner. Further information >>>

Jabber, Inc. serves over ten million users, providing instant messaging and presence solutions across fixed and mobile networks. The Jabber Extensible Communications Platform (Jabber XCP) is a cross protocol solution, supporting IETF protocols XMPP and SIP/SIMPLE as well as the OMA-approved IMPS protocol. Jabber XCP offers the most scalable, extensible, highly available, multi-protocol, and device agnostic presence and messaging solution in the industry.

MoBif Berhad - MoBif VSoftMSN for Windows ® XP Services Pack 2 . Talk it up and save on long distance charges. Have a voice conversation through MoBif VSoft MSN is free. It is based on RTC 1.2 SIP stack.

Movial  Movial Connect is a suite of proven applications that enable device manufactures and service providers to rapidly launch revenue generating converged services across devices. For more information, visit www.movial.fi.

Multimedia Communications Portfolio
Nortel Networks Multimedia Communications portfolio includes carrier-hosted and enterprise multimedia services solutions that unleash communications simplicity and productivity for enterprise and residential subscribers. This portfolio leverages the emerging industry standard Session Initiation Protocol (SIP) to deliver multimedia services including voice, call management, desktop video calling, collaboration tools, and personalization services. More >>>

Multimedia Communication Server 5100
Nortel’s award-winning MCS 5100 delivers SIP-based multimedia applications, including conferencing (audio, video, web), web collaboration, whiteboarding, file exchange, web co-browsing, presence and instant messaging. More >>>

myJabber - myJabber brings a new level of functionality to the desktop with a crystal clear SIP Softphone and secure Instant Messenger.

NGC Systems Sdn Bhd - Genico™ LiveContact; a SIP-compliant user client with VoIP; videocalls; multi-party conferencing; IP Centrex call features; file transfer; IM; presence; whiteboard & application sharing...
Novell - GroupWise IM client will support the proposed Session Initiation Protocol (SIP) and SIP for Instant Messaging and Presence (SIMPLE) instant messaging standards.
Pangean Technologies - REACT provides instant voice communications and features like to presence, recording, intercom, broadcast, hoot and holler, Instant Messaging (IM), push to talk and ad-hoc conference.
Paradial - Paradial RealSIP is a complete standards-based video desktop conferencing product line featuring rich SIP/IM client; MCU; SIP server; and the most complete FW/NAT traversal product in the market.
PhoneGaim - Instant Messenger software that lets you use your computer to make phone calls to all of your Instant Message Buddies on any service (AOL, MSN, ICQ, and Yahoo!) for free.  If you buy SIP Minutes, you can also call any standard phone or mobile phone in the world at great rates.
Reuters Messaging
SIPphone - PhoneGaim is an IM client that enables seemless instant messaging and SIP based voice chat. PhoneGaim is designed to interface with the SIPphone system, and users can assign virtual numbers / custom numbers and purchase minutes all associated with their IM client.
Sphere Communications Inc. - Award-winning Sphericall IP PBX is Instant Messaging; Presence; High Quality VoIP; Unified Messaging; Conferencing; Video; Softphone; SIP and more. Enterprise-class softswitch on existing networks.
Tablet Media - H.323 and SIP standards-compliant client applications for communications and messaging. 
VCOMM UK Ltd - VCOMM host the award winning WorkSmart IP Communications platform which is a SIP based IP Centrex solution incorporating IM; Presence; Click to Talk etc. as well as all of the standard voice services.

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