ZOIPER Communicator is a very intuitive SIP softphone, with presence, chat, video and fax. Very stable, small footprint, skinnable, and with encryption support. It comes with a built in peer 2 peer voip service, so that you can speak chat and videotalk with other users even if your pbx or voip provider does not support those features.

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Download EVCSoft and get free calls. EVCSoft lets you make VoIP sip voice-video calls to users anywhere in the world. Call PC to PC for free, all you need is EVCSoft installed on each machine, a webcam plus a microphone and speakers. Features: supports computer to phone via a VoIP SIP gateway provider, phone to computer, phone to phone, sms messages, video conferences, voice mail, call forwarding, video messages and more. Download free.

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VoIP SIP SDK - A powerful and highly versatile VoIP SDK to accelerate development of SIP applications. Our brand-new SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications. It accelerates the development of SIP/ RTP compliant soft phone with a fully-customizable user interface and brand name.

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Free VOIP / SIP phone (softphone) for Windows. Use your PC as a phone. Works with popular VOIP network providers and SIP PBX's (including 3CX Phone System). The interface is easy to use and similar to that of popular Smartphones. 3CXPhone is compact and easy to install across a network. Features include Call Transfer, Call Recodrding, Hold, Headset support, Call History. Full version, not a lite version.

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Uplink connects SIP protocol VoIP calls to the proprietary Skype phone network. It works in both directions. Connects both incoming and outgoing calls to the Skype network. Can be used to make SkypeOut calls from a SIP device or SIP PBx. Can receive SkypeIn calls and direct them to your SIP extension. Fully complies with the RFC3261 for SIP signalling

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Voicent Agent Dialer is a predictive dialer and semi auto dialer combined. It assists marketing or sales people for telemarketing campaigns. Supports SIP based VOIP, Skype, and traditional phone service. Automatic dialing can play audio messages, transfer calls, and record conversations, all by the press of a key. It helps you to generate leads, reduce work load, save your voice, and increase productivity.

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A Windows free SIP IP PBX software. It is very easy to use and deploy, with powerful features like:ACD, Auto Attendant, Call Park, Ring Group, Conference, Call Pickup Group, Auto Outbound Dialer, Database CDR report, Database PBX Status Report. It supports SIP extensions, SIP accounts, inbound and outbound calls, and customized dial plans. It supports plugins. Plugin samples can be programmed by .NET languange like C#, and vb.net.

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VaxVoIP SIP SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based IP-Telephony make and receive phone calls feature in your web pages and software applications. It delivers superior voice quality by integrating advanced digital voice processing features including acoustic echo cancellation, noise cancellation and adaptive jitter buffering.

Free SIP Softphone for voip providers and customized softphone for voip providers the newest generation of Vidosystem Softphone. Our engineer had successfully recode sip engine to produce more robust, small application, better nat traversal sip softphone. Minipax NOW support SIP tunneling. SIP tunneling works where clients firewall blocked or on a country where voip is blocked.

Embedded Windows CE VOIP Developers Kit is your embedded telephony solution for developing software/hardware to enable device to device phone calls using SIP/H323 phone right at the electronics level. The design is based on Hybrid Combination of RFC SIP Protocol and Windows RTC and is today successfully ported to Windows CE/Pocket PC/Smart Phone.

Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free. You can also call ordinary telephone numbers anywhere in the world if you sign up to a gateway service. It uses the SIP protocol and is compatible with most major VoIP SIP service providers.

Carousel is software to connect VoIP calls to ordinary telephone lines and vice versa using one of a number of professional telephony devices. It works as a virtual FXO gateway. You install it as a service on any Windows PC. SIP protocol VoIP calls will be directed out to standard PSTN analog lines through a telephony board.

OfficeSIP Alerter is a simple, easy-to-use and free sip messenger. It was not designed for prolonged chat, it is handy when you need to send or receive single message. It is good replacement for old-fashioned Alerter Service. OfficeSIP Alerter has simple interface but it is based on Session Initiation Protocol, so you can exchange messages with users of Windows Messenger or other sip messenger.

SIP Phone DLL allows to make PC-PC, PC-phone, or phone-phone calls or create Instant Messaging (IM) sessions over the Internet VOIP SIP Phone SDK brings protocol support for ActiveX. With this SDK one can create a simple program to connect and start speaking with anyone with a direct IP Address (provided no NAT Router or Firewall is set) or use the Gateway or the Gatekeeper to connect to /or from PSTN lines.

Xeleven is the program for calling your friends, relatives and acquaintances all over the world. Xeleven has the simple user-friendly management interface which is similar to the interface of popular programs such as ICQ, Skype, MSN, NetMeeting. Xeleven is based on perspective VoIP (Voice over IP) technology SIP-Session Initiation Protocol.

VoIP Can offer a significant savings for a small, medium or large office. Free enterprise grade VoIP PBX and web based fax solution. Features extensive "movie walkthroughs" to step you through the installation and administration of the software. LiveCD and installation CD Features: Easy web based administration. Rock solid platform. Industrial Grade Hylafax Fax solution with web based faxing and print-to-fax capability.

Notifications: Every single event that occurs in the system is notified to the users to make sure that the system is in their own control and such that no other program is taking its ownership. Encryption: If users have any files which are very importatnt for them and they want nobody to access or modify those files they can encrypt those files in a very advanced manner. Stats: User can know their current status of their syste

An easy to use Internet phone for Mac OS X using VoIP to provide crystal clear voice quality in an attractively sleek interface. The quick configuration will allow you to get talking to other iSoftPhone users in seconds. iSoftPhone is integrated with the Mac OS X address book to make calls and manage contacts. Simply dial the number of the person you wish to talk with or select them from contacts to call.

Axon is a virtual PBX designed to manage calls within a business or call center environment. Any business can implement this scalable PBX solution with only an existing PC which connects to phone lines and extensions using VoIP technology.

Axon Enterprise is a fully featured pbx server without restrictions to manage calls within a business or call center environment. Any business can implement this scalable PBX solution with only an existing PC which connects to phone lines and extensions using VoIP technology.

This firewall is an ICSA certified corporate gateway solution for small to medium companies. Equipped with unified security features, IBM web content filter control, employee monitoring, bandwidth controls and VPN server, Kerio WinRoute Firewall is a powerful user Internet access control and security solution.

Voix Phone Is a multiplatform IAX soft phone, its engine derives from Voix Manager, the powerful Asterisk call manager interface, from wich it inherits stability and robustness. Voix Phone has been thought with simplicity in mind, all feature needed by the user, fast and easy usable, with the minimum configurations, just fill the phone login information and play.