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

  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

    Stop waiting on engineering. Build production-ready internal tools with AI—on your company data, in your cloud.

    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
    Try Retool free
  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Try Free
  • 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.
    Leader badge
    Downloads: 160 This Week
    Last Update:
    See Project
  • 2
    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:
    See Project
  • 3
    Sofia-SIP - a RFC3261 compliant SIP User-Agent library.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 4
    TIPcon1 is a standards-compliant soft phone using text, voice and video with accessibility features.
    Leader badge
    Downloads: 3 This Week
    Last Update:
    See Project
  • Forever Free Full-Stack Observability | Grafana Cloud Icon
    Forever Free Full-Stack Observability | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
  • 5
    OfficeSIP Softphone and Messenger
    OfficeSIP Softphone and Messenger are two enterprise VoIP SIP clients written in C# in .NET Framework. The SIP clients make use of Microsoft UCC API SDK, ensuring the highest quality of audio and video. Compatible with Office Communications Server. See also open source, cross-platform: 1) simple messenger Brief Msg at http://briefmsg.org 2) MUVConf is a multi-user video conferencing, see demo video http://youtu.be/YrBU-Aqtvrk, download https://code.google.com/p/muvconf/downloads/list
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    Audio/Video Conference software for Instant Messengers. It aims to provide Audio/Video conferencing for as many Instant Messengers as possible through a modular design.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    SIP Stack that is RFC 3261 compliant. Project has moved to http://www.resiprocate.org/
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    An overlay Networking Protocol, aims in creating a big secured virtual network, optimizing both speed and cost.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    Real-Time Collaboration (RTC) and conferencing project. This product has been deprecated. Please see the replacement product, CoolCollaborator, at http://coolcollaboratr.sourceforge.net/
    Downloads: 0 This Week
    Last Update:
    See Project
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • 10
    A simple cliet/server voice chat for linux and hopefully windows. The program uses the GSM 06.10 codec for a 13 kbit/s bandwidth
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Cabal is a C++ framework that provides support for high prestation parallel processing network servers and clients. It doesn't provide a protocol, it just gives you the abstraction of data sending/receiving in real time or priority scheduling.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    CaminoTalks is a open source, cross platform videoconferencing system. It is designed to work behind a firewall and can have mutiple connections. It works with all popular Messengers like MSN, AIM, ICQ, GAIM. It overcome Netmeeting/H323.Videoconference.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Chabber
    Chabber is an extensible XMPP-based Instant Messaging application. It is a generic, portable application that follows the standard protocols for Instant Messaging and gives users a lot of advanced functionalities. It provides a platform for plugins.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    This project defines the framework for Distributed Conferencing (DCON) by appropriately orchestrating the operation of a number of XCON (http://www.ietf.org/html.charters/xcon-charter.html) "focus" elements.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Getix uses Direct X extensions for voice conferencing. The goal of this project is to create a program (for Windows) that will allow lobbiable multi-user voice conferencing over LAN or the Internet.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    GibPhone is a highly extensible VoIP/IM client for the .NET framework that uses a powerful plugin engine to allow for UI extensions and any call control stack / media payload / transport protocol combination.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Jabast connects XMPP Clients to a asterisk PBX to allow extension listening, calls and presence controle for Agents.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Serverless, thus trackless protocol plugin for Miranda IM, based on the Kademlia network. Supports chat, file transfer and Internet telephony.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    A Voip GUI write in C#, based in Tapioca-Voip framework, 100% compatible with Gtalk.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    M2S - Free SMS

    M2S - Free SMS

    Chat with your friends everywhere, whether you are in space or on eart

    M2S is an application created by Jaume Segarra web-based, uses HTML5 code, PHP, Javascript and CSS to provide users of Firefox OS an application to send free messages. Being a web application, M2S is available for all devices with Internet access either mobile devices, computers or televisions SmarTV.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    A modularly designed system providing command/trigger functionality and response mechanism via SMS text messages
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Murmur WebAdministrator is an web interface for end user to control a murmur server ( stand alone mumble server). With Murmur WebAdministrator you can : - start and stop server - edit config - users manager - see logs. READ README FILE !!!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    My-WIM is a new instant messenger service, which provides chat, white board, voice and video chat, games, file share, file transfer and many more features. Active development started!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    MySXP Client: Is an ActiveX COM Microsoft Windows platform; The objective of this Component is to create a terminal service for a wide open server services as, IM, RPC for client app., RPC, DB terminal, Multiplayer Game client, WebCam, voIP Client.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • Next
MongoDB Logo MongoDB