Open Source Windows Internet Phone Software

Internet Phone Software for Windows

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Browse free open source Internet Phone software and projects for Windows below. Use the toggles on the left to filter open source Internet Phone software by OS, license, language, programming language, and project status.

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  • 1
    Mumble

    Mumble

    Low-latency, high quality voice chat for gamers

    Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming. It includes game linking, so voice from other players comes from the direction of their characters, and has echo cancellation so the sound from your loudspeakers won't be audible to other players.
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    Downloads: 160 This Week
    Last Update:
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  • 2
    Elastix

    Elastix

    Unified Communications Server

    Elastix is a software-based PBX powered by 3CX and based on Debian. An open-standards solution, Elastix is an easy to install and manage UC system compatible with popular IP phones, gateways and SIP trunks. Elastix is complete with unified communications features such as integrated WebRTC video conferencing, chat, presence and softphones and smartphone clients for Windows, Mac, iOS and Android.
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    Downloads: 137 This Week
    Last Update:
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  • 3
    This project implements a simple STUN server and client on Windows, Linux, and Solaris. The STUN protocol (Simple Traversal of UDP through NATs) is described in the IETF RFC 3489, available at http://www.ietf.org/rfc/rfc3489.txt
    Downloads: 53 This Week
    Last Update:
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  • 4
    Open Phone Abstraction Library (OPAL) is a C++ multi-platform, multi-protocol library for Fax, Video & Voice over IP and other networks. Also included is the Portable Tool Library (PTLib) which is a C++ multi-platform abstraction library and collection o
    Downloads: 17 This Week
    Last Update:
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  • 5
    Kiax is a softphone (soft phone, VoIP client) with a simple and comfortable user interface for making VoIP calls to Asterisk PBX. It depends on the iaxclient library to use Asterisk's IAX2 protocol for easy call configuration and audio setup.
    Downloads: 14 This Week
    Last Update:
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  • 6
    CafeSip - Look what Java and SIP can do

    CafeSip - Look what Java and SIP can do

    A suite of open-source tools and frameworks for creating SIP apps

    Session Initialtion Protocol (SIP) is widely used for telephone services over the Internet. CafeSip provides a suite of open-source tools and applications for creating customized SIP services and applications using the Java.
    Downloads: 15 This Week
    Last Update:
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  • 7
    Activa brings the Asterisk IP PBX to the call center. Built on top of Asterisk, Activa components enable successful call center implementations adding value in areas such as computer telephony, screenpop&click2dial, agent control, automatic dialing...
    Downloads: 3 This Week
    Last Update:
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  • 8
    jphonelite

    jphonelite

    Java VoIP Softphone (SIP) (replaced by jfPhone)

    jphonelite is a Java SIP VoIP SoftPhone for Desktops (Windows, Linux, Mac) and Android. Features 6 lines with transfer, hold, conference (up to all 6 lines), g711 u/a, g722, g729a, and video (video support in Linux or Windows only and includes H263/H264/VP8). Applet includes full JavaScript support. STUN/TURN/ICE supported. Encrypt media with SRTP. DTLS Key Exchange. Video conferencing with jPBXLite/0.12+ NOTE : THIS PROJECT HAS BEEN SUPERSEDED BY jfPhone. Please go to jfphone.sourceforge.net to get latest version.
    Downloads: 3 This Week
    Last Update:
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  • 9
    A TAPI driver for SIP. SIPTAPI gives you a click2dial feature with any TAPI enabled application (e.g. MS Outlook) and SIP PBX/proxy. This is the "free" version of SIPTAPI. There is also an enhanced commercial version available at www.ipcom.at.
    Downloads: 6 This Week
    Last Update:
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  • 10
    VMukti open source is leading Asterisk/ Yate enabled p2p Video IP Communications Suite for Web / PSTN. These serverless broadband ready platform enable OS community to save 90% on capital & operating costs over proprietary software for conferencing &
    Downloads: 2 This Week
    Last Update:
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  • 11
    Intel Integrated Performace Primitives audio/video codecs plug-in for the OPAL/OpenH323 library including G.728, G.729, G.723.1, G.722.2 GSM-FR, GSM-AMR, H.261, H.263, H.264 and MPEG4 part 2.
    Downloads: 4 This Week
    Last Update:
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  • 12
    Voxy - the simplest way to integrate VoiceXML applications in Asterisk. Configure your dial plan with the URL of your VoiceXML application and it's done.
    Downloads: 5 This Week
    Last Update:
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  • 13
    jfPhone

    jfPhone

    VoIP/SIP SoftPhone (formerly known as jphonelite)

    jfPhone is a VoIP/SIP SoftPhone for Desktops.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 14
    GNU Gatekeeper (GnuGk)

    GNU Gatekeeper (GnuGk)

    H.323 Gatekeeper for VoIP and videconferencing

    The project has moved! Please find current versions at https://www.gnugk.org/ The GNU Gatekeeper (GnuGk) is a full featured H.323 gatekeeper under GPL license. It supports VoIP and videoconferencing and includes Radius and database support and many call routing functions. The project has moved! Please find current versions at https://www.gnugk.org/
    Downloads: 3 This Week
    Last Update:
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  • 15
    The Cisco IP Telephony Services project contains many IP phone services and utilities for the Cisco 79XX phones and CallManager. This project houses several scripts, services, and administration tools. Recruiting! Contact me and become a developer.
    Downloads: 8 This Week
    Last Update:
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  • 16
    This project has been superseded by OpalVoip (https://sourceforge.net/projects/opalvoip/) and H323Plus (https://sourceforge.net/projects/h323plus/) The OpenH323 project provides full featured, interoperable, Open Source implementation of the ITU H.323 teleconferencing protocol that can be used by personal developers and commercial users without charge.
    Downloads: 4 This Week
    Last Update:
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  • 17
    Unix based War Dialer (War dialer). Used to audit PSTN (Phone) Security. Random/Sequential dialing, MySQL/ASCII Flat file storage, IAX2/VoIP support, blacklisted number, save state, several methods of "tone location", "ncurses" front end.
    Downloads: 7 This Week
    Last Update:
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  • 18
    Java SIP softphone
    Peers is a very simple softphone. It's a SIP User-Agent, written in java, it works on windows, linux and mac. It can be used with SIP servers like opensips or asterisk IPBX. It supports G711 codec (PCMU and PCMA) and telephone-events (DTMF).
    Downloads: 1 This Week
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  • 19
    A Windows based application used to manage contacts and call them via Google Voice with the click of a button.
    Downloads: 3 This Week
    Last Update:
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  • 20
    A patent-free audio codec designed especially for voice (unlike Vorbis which targets general audio) signals and providing good narrowband and wideband quality. This project is complementary to the Ogg Vorbis codec.
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    Downloads: 3 This Week
    Last Update:
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  • 21
    Open79XX XMLDirectory is an open PHP-based XML menuing system for providing on-screen services to the Cisco 79XX Series IP Phones. It contains dynamically generated phone directories, on-screen memos, links to other services, and many more options.
    Downloads: 5 This Week
    Last Update:
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  • 22
    jlibrtp aims to create a library that makes it easy to support RTP (RFC 3550,3551) in Java applications. SRTP (RFC 3771) has been delayed in favor of RFC 4585.
    Downloads: 2 This Week
    Last Update:
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  • 23
    The Skype SourceForge project is the public repository for Skype-related open-source projects including SkypeWeb and Skype API implementations. Do you have a SkypeWeb or SkypeAPI project you'd like to share? Get in touch!
    Downloads: 2 This Week
    Last Update:
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  • 24
    A lightweight cross platform IP telephony client using the IAX protocol, designed for use with the asterisk open source PBX.
    Downloads: 2 This Week
    Last Update:
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  • 25
    The Wizard's Apprentice is an application that allows you to ask questions from a script. It uses Windows dialog boxes in the so-called Wizard style: dialogs asking one question at a time, with a Back button, a Next button and a Cancel button.
    Downloads: 2 This Week
    Last Update:
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