SIP Client Software    

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Adore Softphone - Adore Softphone Provides SIP Softphone; Web2Phone; Video Softphone; Call Recording Softphone; Click2Call; Instant Messenger etc.
AdoreInfotech - Private label, Customizable SIP dialer based on SIP technology, NAT modules with microsoft g723.1 codec. Works in Win2000/NT/XP/98.
ageet Corporation - Offers AGEphone; an extremely small and light SIP Client software. Also provides business to business software solutions for VoIP related products; focussing on small-scale embedded systems.
Ahead Software - SIPPS SIP Client software: optimal sound quality, intuitive user interface, free registrar server
AimSoftwares - SIP Dialer is designed with latest SIP technology (SIP 2.0), NAT module (so it can operate easily through NAT and packet firewalls).  SIP Softphone. Support NAT traversal and band width control.
AlbaTalk - AlbaTalk sip

ANDROME - Intellivic Softphone - SIP based Softphone for Windows. Supports audio and video calls; as well as presence and instant messaging. Supports all major audio and video codecs. Based on Intellivic SDK.
Antepo - Enterprise IM Client For BlackBerry Wireless Handhelds. OPN System is the first and only EIM solution on the market to support interoperability between all XMPP and SIP/SIMPLE standards-based systems, enabling real-time communications across any IM network.
Anyuser - SIP Client for windows
Arcosoft Inc - New VoIP caller ID software; VONaLink ScreenPop; works with any VoIP phone system based on the SIP standard to provide screen pops and reject calls.
aTelo

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Avaya SIP Softphone: This SIP-enabled IP Softphone turns any PC into an office phone. This easy-to-use soft phone allows users to send encrypted instant messages, initiate 'click-to-talk' phone calls with contacts, show and view availability/phone status of users, and dial phone numbers listed on Web sites.  It dual protocol support of H.323 for telephony and SIP for presence and instant messaging provides organizations with the flexibility to gradually introduce SIP-based communications into their networks.
Learn more at Avaya.com >>> 

Avaya IP Agent:  Avaya IP Agent is a soft phone application that enables contact center agents to work from any PC, anywhere, as long as they can connect to your corporate network. Avaya IP Agent provides the complete set of sophisticated agent features from Avaya best-in-class suite of contact center products, plus an additional set of powerful capabilities including Instant Messaging and Click-to-dial.

Avaya IP Agent also introduces SIP-enabled presence into your call center, giving your agents the ability to access an expert for immediate help with the tough questions. Agents are able to provide requested information without having to transfer calls or schedule callbacks — one and done.  Delivering one-call resolution to more of your customers reduces costs while increasing customer satisfaction. Learn more at Avaya.com >>>    

Avaya SIP Application Server (SIP A/S): The SIP A/S is both a carrier-class deployment platform and a programmable, standards-based application creation environment (ACE) that allows service providers, ISVs and OEMs to develop and deploy next-generation converged communications services. Avaya assists customers to accelerate the creation of customized SIP applications through its expert Professional Services Organization. The company has corporate offices in the US, UK, China, Japan and Canada. Learn more at Avaya.com >>> 

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Beijing iPower Time Information Technologies Co., Ltd - our Sipper-II is a SIP supported soft video phone, supports video, voice, and IM services etc.

BHARTI - SIP SOFT PHONE

BON.net - Babble - a complete soft client with instant messaging and outlook integration and centralised billing and payment functions

Brotecs Technology Limited - Brotecs’s SIP-based soft-phone runs on Windows & supports G.723; G.711; G.729; GSM; Transfer; Call Forward; Echo Cancellation and many more. It runs on WiFi; Cable; ASDL and even Dial-Up environments.

Continuous Computing - Continuous Computing offers Trillium protocol software SIP UAs (SIP UA and SIP B2B UA). These offerings are compliant with industry standards; offer extensive APIs; and operate on all major OSs.

Corinex - User friendly Softphone from the Powerline technology leader. Can be used in combination with Corinex USB VoIP Phone. Preinstalled for most wanted free service providers.

Cornfed Systems LLC - The Cornfed SIP User Agent is a Session Initiation Protocol (SIP) based softphone for your IBM-compatible Personal Computer running the Linux operating system.

Critical Path - IM (instant messaging) application for wireless carriers and service providers.

CTL Inc. - Delivering SIP Integration Solutions for IP Telephony.
curibo-shop - German Vendor for SIP based VoIP Software

deltathree - SIP-Based PC-to-Phone Software

Duxoft - Private labeled; fully customizable SIP soft-phone with G.723.1; G 729; G 711 codecs. It works with Windows 98/Me/2000/XP/2003/Vista.

DyLogic Srl - Mirial SIP Softphone

EarthLink - SIP based VoIP and IM client. Free on-net calling. Download includes 30 free domestic minutes of PSTN calling.

Ecrio Inc - Instant Messaging and Presence Services (IMPS) handset software and communication servers

Encore Software Ltd. - SIP 3261 UA with Handset/SLIC manager, RTP/RTCP, DTMF-RFC 2833 and choice of codecs (G.7xx, G.168, GSM.AMR, QCELP13, EVRC, Selectable mode vocoder, VAD/CNG).

eStara - A customizable SIP software client.

Eyeball Networks - Eyeball Messenger is a standards based soft client that is SIP & XMPP compliant; providing full featured VoIP; video telephony; presence and instant messaging. IM with Yahoo; AOL; MSN & Google.

eyeP Media S.A - Highly customizable and seamlessly ingegrated SIP Softphones; also available as SDK. Proven Interoperability with large range of SIP platforms. Address Service Providers or solution integrators.

FaramTech - FaramPhone: Support SIP Audio&Video Call; Video Conference; Video mail; Record Video Clip to 3GP file

FaxBack Inc. - NET SatisFAXtion Port Server; Carrier-grade; real-time SIP T.38 VoIP fax solution with SDK. Scales to 672 ports in a single 1U rack mount system. Connects fax clients via HTTPS. Secure SSL faxing.

fring - fring enables users to make mVoIP (mobile VoIP) calls with any SIP provider even from non-SIP enabled phones.

Global IP Telecommunications Ltd - X-TAPI lite/Pro is a full-featured tapi-based softphone (SIP): Additional features: callto: ; sip2:; mobile use; dial rules (Pro); different languages available; DeveloperKit available

Guo Wei - Delivering SIP Solutions for media education

Hampton Software Ltd - Articulation - SIP phone for PalmOS PDAs. Turns your Palm PDA into a WiFi phone (or a Bluetooth/EVDO/GPRS phone)

HCL Technologies Ltd - HCL SIP User Agent

Heiko Sommerfeldt - Phoner is a free SIP based softphone for Windows including an answering machine and TTS support.

Hellosoft - Hellosoft is leading SIP; IMS and VCC client vendor and has many commercial applications and IOTs with leading infrastructure vendors

Hivocal - SIP UA for PDA Win CE

Hughes Software Systems - 3261 compliant & customizable SIP User Agent Toolkit

IAP Company LImited - This SIP User Agent conforms to RFC 3261 and can be deployed in embedded and ubiquitous devices. This is especially optimized for T-Engine platform.

IBM - Lotus Sametime 2.5

Ind TeleSoft - Mobile SIP Suite - SIP infrastructure components for building multimedia applications

Inexbee - Mercuro IMS Client. SIP/3GPP/IMS and RCS compliant softphone.

Innovative Systems of Communication - First flash-based SIP softphone - make calls right from webpage; don't need to install anything

Integrated Voice Resources - Master integrators of customized Interactive Intelligence SIP based contact centers

The Interactive Intelligence SIP-based IP telephony software comes with a built-in desktop interface called the Interaction Client®. The Interaction Client provides a single interface for call control - including transfer, record and conference - corporate directory access, and real-time status look-up.  Visit Interactive Intelligence's SIP showcase >>>

 

International Systems Research - SIP Softphone for PC, Notebook, and Mobile devices (PDA). High performance on narrow bandwidths. Customizable. SIP Stack also available. Japanese and English support.

Kapanga - Kapanga Softphone is the premier SIP client that delivers multicodec support for voice and video and T.38 fax communications in one single application.

M5T - The M5T SIP-UA SAFE component is an implementation of RFC 3261 – “Session Initiation Protocol” in a C++ framework for building advanced SIP applications.

MailVision Ltd. - Advanced SIP Communication Center. Voice; Video and IM. Multiple Accounts ( SIP Providers) NAT Traversal, Call Forward ( Busy; No Answer; Unconditional ), Message Waiting Indicator.

Mediaring VoizBridge - SIP B2BUA (Back to Back User Agent) for NAT Traversal and Topology Hiding (Wholesale carrier networks).

Microsoft - Windows Messenger

Microsoft Portrait - a research prototype for mobile video communication.
MIP Telecom - Development tool kit for UA applications

Mirial - Mirial Softphone (SIP/h323) for HD and SD video conferencing and desktop telepresence - Compliant with major communication standards - Featuring 3-party video calls; recording/exporting capabilities

MizuTech - MizuPhone at has features never seen in other SIP softphones like HD video; Remote Desktop over SIP; UltraWideband codec.

Movial Corporation  The Movial Connect application suite rapidly integrates Presence, Instant Messaging, and Multimedia applications in mobile devices. The Movial Connect suite consists of: Presence Engine SDK, Instant Messaging, PoC, Voice Instant Messaging, Push-to-Video, Instant Conference, and Presence-enhanced Othello game based on SIP and IMS standards. Movial is a pioneer in bringing SIP-based Presence and Presence services to mobile devices.

myJabber myJabber's CompleteAE is a full featured SIP softphone offering all the benefits of a conventional telephone; on your computer; using the internet to complete your call.

NCH SwiftSound - Express Talk - Free. Call anyone on the internet who has Express Talk (or any other SIP voip softphone). Dat compression; on-hold; call transfer; supports 4 lines; call ID display and call recording.

Nero AG - SIPPS is a SIP compliant softphone. It is available as business phone and OEM software for ISPs, ITSPs and Carriers. 

NetCODEC - Bluetooth Based Mobile Handset; Video Telephone; RFC 3261 Support; Telephony Supplementary Service Support.

NewHeights Software - Desktop Assistant(TM) applications are used to create customer-branded, Personal Communication Management (PCM) software products that add value to CPE telephony equipment and hosted telephony services.

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...

Nine-9s - SIP source code toolkit for implementing embedded systems. Small ROM and RAM footprint; high performance stack. Written by embedded systems engineers for embedded engineers.

NMS Communications - NMS's SIP-based Mobile IMS Client delivers end-to-end client application solutions with next-generation features & services; including Active Phone Book and Mobile Video Sharing.

   Visit Nortel Networks' SIP showcase >>>

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
The Nortel Networks Multimedia Communication Server (MCS) 5100 is a multimedia communications and collaboration applications delivery solution for Enterprises that seamlessly delivers converged multimedia services to employees regardless of their work location. The MCS 5100 drives VoIP networks, delivering multimedia and collaborative applications to the enterprise on an "open" platform that supports industry-standard protocols, including SIP and H.323. More >>>

Multimedia Communication Server 5200
The Nortel Networks Multimedia Communication Server 5200—which seamlessly integrates voice with video, collaboration, and presence services—enables service providers to deliver hosted multimedia communications services to create new revenue-generating opportunities. These Session Initiation Protocol-based (SIP), next generation, multimedia services enhance the ability for both enterprise and consumer end-users to communicate and collaborate more effectively and efficiently.  More >>>

Click here for a flash overview of the MCS 5200 >>>

Tablet Media - iFon(TM): advanced integrated voice, video and messaging for PDAs and smartphones

Kapsch CarrierCom - SIP Client software and ENUM Services
Lycos Instant Messenger

Novell - GroupWise IM client will support the proposed Session Initiation Protocol (SIP) and SIP for Instant Messaging and Presence (SIMPLE) instant messaging standards.

Null Team - Yate can be used as a softphone for H.323; SIP; and IAX under Windows and Linux for free. It can also integrate a browser to build callcenters.

Nuvoiz Inc. - Nuvoiz provides SIP and XMPP based; WiMAX/WiFi enabled SoftPhone products with extensive NAT/NAPT/FireWall traversal capabilities.

optimalVOICE Technologies GmbH - Voizilla Softphone SIP

PCBest Network - PCBest Network provides SIP solutions for business. Its SIP SDK is very powerful; stable and easy to use. It can be used to develop SIP softphone or SIP server applications. Free to download and try.

Polystar OSIX AB Xsense features CDR generation for SIP and client applications for SIP signalling surveillance. With the Protocol Analyser application you can monitor SIP protocol messages in real-time or historically, and the Call Trace application monitors all the on-going SIP calling processes, either in real-time or in historical mode.

Packetway, Inc. - PEERiX : SIP Phone Framework based on Packetway\'s SIP/SDP/RTP/RTCP Stack

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 IM SIP client

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.

Pingtel - SIP-based IP Softphone

Polypix Inc - SIP UA for PC, PDA, Linux. Supported voice codec - G.711, G.723.1, G.729.A. Supported video codec - H.263 ( QCIF, CIF, QVGA, QSIF )

pyro - We are planing to give the buddies presence infemation using openser as sip proxy server. and call routing dirct calls and voice mail calls and routing for CRBT. using mysql database as well as daimet

QUINTUM Technologies - Tenor VoIP MultiPath Switches:Complete risk-free, patented VoIP solutions

    Visit RADVISION's SIP Showcase >>>

IP Phone and IAD toolkit
RADVISION's IP Phone and IAD Toolkit provides a complete IP phone and IAD application presented as a comprehensive framework for developing silicon-based applications. The components are based on RADVISION industry standards-compliant SIP, H.323, and MEGACO protocols.

The solution consists of:

• RADVISION Protocol Components for media control, call control and media transport
• Media Device Manager abstracts the RADVISION media and call control protocols and interfaces them to the DSP software infrastructure
• Call Control Managers for handling all events, signals and media connections on the gateway for a specific protocol. These encapsulate a complete IP phone application

Reuters Messaging
Securax - ZOIPER 2.0 Free Edition is a user-friendly feature-rich SIP and IAX softphone; compatible with the Asterisk platform or any other SIP or IAX capable system.

Servonic - Voice over IP Client

SESCA Innovations Oy - Click to Call solution with SIP based IP Sofphone.

Shaw Cable - Shaw Messenger is a SIP client that connects you to other Shaw Internet users. Its features include text messaging, voice/video conferencing, file transfer, and more.

   Visit Siemens' SIP Showcase >>>

SIP Client V1.0

The SCS Client is a powerful multimedia application that solves all of the PC-user's communication needs by providing a wide range of communication features. The convergence of presence-based features and multimedia communication (audio, video, chat, instant messages and document file transfer) into a single application brings the idea of "polite telephony" into life and gives the user the right tool to exploit the possibilities of both the "old" and "new" telecommunication worlds.

SIP Communications - Windows-based communications clients

sip-communicator.org - SIP Communicator is an audio/video Internet phone and instant messenger that supports some of the most popular instant messaging and telephony protocols such as SIP; Jabber; AIM/ICQ; MSN; and Yahoo!

SIPMethod User Agent Toolkit - SIPMethod U/A Toolkit offers a simple event/listener Java API for SIP endpoint applications. Supports: RFC 2976; RFC 3261; RFC 3263; RFC 3265; RFC 3428; RFC 3525; RFC 3566.

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.

SIPquest Inc. - SIPquest offers the richest portfolio of SIP-based soft clients enabling Fixed to Mobile convergence with an evolution to IMS.

SIP Response - SIP Based Personal Call Center and Softphone. Supports commercial softphone accounts; such as Vonage; or can be used with your coporate SIP PBX.

SipTelecom - AdiPhone - SIP Soft Phone supports NAT; STUN; whiteboard and desktop collaboration. For windows environment.

SpeedVoIP Communication Technology Co.; Ltd - For political & economic reasons; ISP may block VoIP in your country. To protect your VoIP business & profit; SpeedVoIP provides patent Security SIP Softphone/Dialer; which circumvent VoIP blockage.

Sprint - Sprint Enterprise IM.

Stratasoft Inc. - StrataSIP(TM), a soft phone which will allow agents to connect voice calls processed by the StrataDial(R).VC2(TM), its flagship contact center product, over the Internet.

Tablet Media - H.323 and SIP standards-compliant client applications for communications and messaging.

Talking Technologies - The EN-PDA Softphone is a state-of-the-art SIP/H.323 softphone that can handle outgoing as well as incoming phone calls from any Pocket PC.

Tata Elxsi Ltd - We have a portable SIP stack with all the latest compliance to RFCs. We also market the VoIP phone and gateway server architecture.

TekIVR - TekIVR is a SIP Interactive Voice System (IVR) which provides "Call Attendant" function (Based on RFC 3261) runs under Windows.

TelcoBlue - PC to phone software

TeleSoft International - CompactSIP UA - smallest footprint Source Code stack with support for WM 6.0; XP; VISTA; Symbian; Nucleus; VxWorks; Linux & GIPS VoiceEngine. Modular solution supports 45 RFCs and uses only 0.1 MIP.

Telia - Telia Messenger

Teligent - The Teligent SoftPhone is Outlook integrated and supports multiple calls and Hifi sound codecs

Total Sanity Solutions Inc - Total Sanity Solutions is now offering a complete desktop integration package for it SIP based IP/PBX solution. Not web based but client side application wirtten in .NET to run on most systems.

Trinity Convergence - The hi-fidelity VeriCall Edge software delivers a SIP software client that fully integrates all of the media processing and packet handling software required to develop voice and video over IP devices

Twinkle - SIP based softphone for Linux. Easily integrates with KAddressbook.

Unicorn Software and Solutions - Smart Dialer is a windows based commercial SIP client software with g.723.1 and optional g.729 codec support. Customized skin is available on client request.

Wave Three Software - PC/Mac interoperable software for Video, Voice and data collaboration

Wipro - Fully RFC3261 compliant SIP Stack and UA

Xten Networks, Inc - SIP-based softphone for Windows PCs & Wireless PocketPC/CE devices gives power and flexibility to deliver an enhanced VOIP endpoint.

Yelet Inc - With support for Windows and Windows CE powered personal digital assistants, YeLet's SIP softphones can be more easily deployed by your customers than those from any other softphone vendor.

Zentrum - Customer Relationship Management

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