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Zoiper Free IAX and SIP softphone

Free - Attractel
ZOIPER 2.0 Free SIP and IAX is a user-friendly softphone, compatible with Asterisk or any other SIP or IAX capable system. High-quality VoIP experience with features like: SIP + IAX protocols, T.38 fax support, STUN support, Echo cancellation, DTMF tones, Adaptive jitter buffer, Call transfer, Hold function, Multilanguage support, Portable storage compatibility, Codecs: GSM, ulaw, alaw, speex, ilbc.
voip, soft phone, sipphone, voip phone, asterisk, ip pbx, softphone, phone, rtc api, vonage, voip phone system, instant messaging
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Express Talk VoIP Softphone

Free - NCH Software
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.
3cxphone, rfc standards voip, openh323, sip stack, web phone, cisco, h323, sip softphone, voip provider, voice, unified teamwork, collanos software
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Mizu SoftPhone

$50.00 - MizuTech
MizuPhone has features never seen in other SIP softphones like HD video, Remote Desktop over SIP, UltraWideband codec and others. MizuPhone helps to join the largest comunity in the world. Over 10 million existing SIP users. The VOIP client that takes the most of the newest VOIP technologies. With the help of its advanced network handling, it will work behind NAT's where other softphone's will fail. Full compatibility with your SIP infrastructure
collanos phone, jabber, yahoo, video, voice services, unified collaboration, communication, voip softphone, free softphone, telephony, sunshing, free world dialup
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Vphonet

Free - Vphonet - LANS HK Ltd.
Use Vphonet as a telephone. Vphonet allows you to see, hear, send sms or files, and chat with anyone, anywhere in the world for free. You can also make calls from Vphonet to landlines and mobile phones at cheap rates. Vphonet's features: call forwarding, call transfer, call deflection, video conferences, video messages, answering machine, handsfree mode,address book. Use Vphonet to make phone to phone and phone to PC calls. Download for free.
ipkall, stanaphone, iconnethere, sipgate, free ip call, ip com, broadvoice, lets ring, telephone, zoiper, windows, linux
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Minipax

Free - Vidosystem
Minipax is 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. SIP tunneling also give more security to voip
Minipax support hold function, mute function, mic/spk volume control, transfer call, for
attractel, calling, t 38, asteriskguru, iax2, srtp, idefisk, iax and sip, internet telephony, portable voip, softphone sip, sip software
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Embedded VOIP SIP Developers Kit

$799.00 - Research Lab Inc
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.
free phone calls, internet phone calls, softphone software, free voip phone, internet phone, voip phone software, voip client application, broadband phone, phone to phone, free calling over internet, virtual number, video conference
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