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Twinkle is a soft phone for your voice over IP communcations using the SIP protocol. You can use it for direct IP phone to IP phone communication or in a network using a SIP proxy to route your calls.

Free Zoiper softphone, Web Phone & SDK for windows, mac, linux & mobile phones. Get your own OEM branded and customized softphone. Free Download

The Award Winning Business Phone Service over the Internet. OnSIP business VoIP service is a hosted pbx system that allows you to streamline your business communications. There’s no phone company hassle, no phone system to buy or manage, no contracts

Get your 800 numbers, toll free numbers, virtual pbx, internet fax and virtual phone system setup online in minutes with Ring Central, the industry leader in hosted business phone services.

Voipcheap is your solution for free phone calls and cheap phone calls! You can call via your fixed and mobile phone or via your computer. The possibilities are endless!!

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Honest VoIP service reviews. GET VOIP is the best VoIP guide for home and business VoIP Provider services and reviews. Compare VoIP services and get all the facts you need.

3CX VOIP PBX - provides an easy to use, plug and play SIP - IP PABX for Windows. With a software based IP PBX you will save on PBX maintenance and halve your phone bill. Download the FREE edition today and break free from your proprietary phone syste...

Zoiper Free IAX and SIP softphone free download. Get the latest version now. ZOIPER 2.0 Free Edition is IAX / IAX2 and SIP phone, compatible with Asterisk.