Soft Phones

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  1. Twinkle

    Twinkle

    Twinkle - Open Source VoIP Solutions

    Open Source VoIP Application

    Twinkle is a open source software application for Voice over Internet Protocol (VoIP) voice communications in IP networks, such as the Internet. It is designed for GNU/Linux operating systems and uses the Qt toolkit for its graphical user interface. For call signaling it employs the Session Initiation Protocol (SIP). It also features direct IP-to-IP calls. Media streams are transmitted via the Real-time Transport Protocol (RTP) which may be encrypted with the Secure Real-time Transport Protocol (SRTP) and the ZRTP security protocols.

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  2. Ekiga

    Ekiga

    Ekiga – Open Source VoIP Service

    Open Source VoIP Client for Windows & Linux

    Ekiga is an open-source VoIP service that is compatible with Windows and Linux. Ekiga allows you to make voice and video phone calls and to send text messages to cell phones. It also enables standard telephony features like call holding, call forwarding and dial tone.
    Ekiga supports a common VoIP protocol called session interface protocol and offers you a free SIP address during registration. You can configure multiple SIP addresses through the client and use those addresses simultaneously. Ekiga does not support encryption.

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  3. QuteCom

    QuteCom

    QuteCom - Open Source Softphone

    Open Source Communication Software

    QuteCom is a SIP compliant software. VoIP client developed by the QuteCom (previously OpenWengo) community under the GNU General Public License (GPL). It allows users to speak to other users of SIP compliant VoIP software at no cost. It also allows users to call landlines and cell phones, send SMS and make video calls. QuteCom is an free and open source voice-over-ip, and video conferencing application. The latest version of the software is always available on the QuteCom website.

    QuteCom 2.2 is licensed under the GPL, and is free software.

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  4. Linphone

    Linphone

    Linphone – Internet Phone

    Open-source VoIP software

    Linphone is an internet phone or Voice Over IP phone (VoIP). Linphone let you communicate freely with people over the internet, with voice, video, and text instant messaging. Linphone makes use of the SIP protocol, an open standard for internet telephony. This open source VoIP software can be used with any SIP VoIP operator.
    Linphone is available for desktop computers: Linux, Windows, MacOSX, and for mobile phones: Android, iPhone, Blackberry. Linphone is portable with: Linux/x86 and Linux/x86-64, Windows XP and Vista, MacOS X x86, Google Android, Iphone OS, Blackberry OS, WebOS, FreeBSD and OpenBSD - with minor modifications.

    Download Opensoftphone - Open Source Softphone Learn More...
  5. SflPhone

    SflPhone

    SflPhone – SoftPhone for GNU/Linux

    SflPhone – The free software enterprise-class SoftPhone

    SFLphone is a robust, standards-compliant enterprise softphone, for desktop and embedded systems. It is designed to handle several hundred calls a day.SFLphone is one of the few soft phones under Linux to support Pulse Audio out of the box. The Ubuntu documentation recommends it for enterprise use because of features like conferencing and attended call transfer. It has been named by CIO magazine among the 5 open source VoIP soft phones to watch.

    Download SflPhone - Open Source Softphone

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