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

  • Try Google Cloud Risk-Free With $300 in Credit Icon
    Try Google Cloud Risk-Free With $300 in Credit

    No hidden charges. No surprise bills. Cancel anytime.

    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
    Start Free
  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Try Free
  • 1
    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: 61 This Week
    Last Update:
    See Project
  • 2
    Network Caller ID
    The NCID (Network Caller ID) project is Caller ID (CID) distributed over a network. The project contains the NCID package and 4 optional client packages. Each package is described at the NCID web site. A non-inclusive list of 3rd party addons is also available at the web site Available Packages: NCID - contains the server, gateways, and a client with output modules LCDncid - a client that uses LCDproc to display Caller ID on a LCD display NCIDandroid - a client and gateway for Android devices NCIDdisplay - a homebrew client that displays on large LED modules NCIDpop - a popup client for Windows, Mac, and Linux
    Leader badge
    Downloads: 13 This Week
    Last Update:
    See Project
  • 3
    mCast is an application that broadcasts short text messages to mobile phones. It transmits a single message to multiple users via both SMS gateways and other wireless service providers' websites (i.e. for providers who do not use GSM networks).
    Downloads: 18 This Week
    Last Update:
    See Project
  • 4
    Using the new C# Dll from swig portability of Openobex/ObexFtp to write a nice GUI able to transfer file between two devices with obex protocol. More Info’s here: http://cs-obexftp.wiki.sourceforge.net/
    Downloads: 11 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
  • 5
    Stuntman - STUN server and client

    Stuntman - STUN server and client

    High performance, production quality STUN server and client library

    New version 1.2. This is the code to STUNTMAN - an open source STUN server and client code by john selbie. Compliant with the latest RFCs including 5389, 5769, and 5780. Also includes backwards compatibility for RFC 3489. ICE and WebRTC ready. Version 1.2 compiles on Linux, MacOS, BSD, and Solaris. Supports the STUN protocol on both UDP and TCP for both IPv4 and IPv6. Windows binaries are also provided. Additional features are in development. This is a mirror of the code on https://github.com/jselbie/stunserver More details on the project's website: http://www.stunprotocol.org
    Leader badge
    Downloads: 11 This Week
    Last Update:
    See Project
  • 6
    The WBXML Library is a C library for handling WBXML (Wireless Binary XML) documents. It consists of a WBXML Parser (with a SAX like interface), a generic WBXML Encoder, and an internal representation of the document (WBXMLTree).
    Leader badge
    Downloads: 2 This Week
    Last Update:
    See Project
  • 7
    Asterisk PBX Integration Zimlet is an Extension for Zimbra Collaboration Suite. The Zimlet does Interface with the Asterisk Manager Interface to integrate with Asterisk PBX. The main focus is dial-on-click for Phone numbers inside Contacts and Emails.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Asterisk Manage API and FAGI C++ Framework. Implemented with high efficient OS independent Sockets wrapper (ACE). Provide C++ API wrappers for Asterisk Manager API and FAGI. A Manage API relay(proxy) server and a FAGI socket server will be implemented.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    CPLed is an OpenSIPS tool for editing CPL scripts in a friendly and easy graphical way. It can be used as a standalone application or embedded in a web page as applet. It also provide CPL script transport functionalities via SIP and HTTP protocols.
    Downloads: 0 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
  • 10
    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: 0 This Week
    Last Update:
    See Project
  • 11
    openSMS is a project to send SMS (Short Message System) from your computer. This system works on websites that offer free sms with free registration.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Implementation of a protocol to let people summarize into a single address, similar in form to an email address, personal data such as electronic addresses or telephone numbers. This would be useful for handheld devices such as mobile telephones.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13

    JAVIER

    JAvascript Voicexml InterpretER

    JAVIER is a JAvascript Voicexml InterpretER, designed (but not restricted) to run inside a web browser, its main engine has less than 1000 lines of code. It's maybe, the tiniest but (almost) FULL VoiceXML implementation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    JavaPH is a client used for querying PH servers - distributed as a free, open source, cross platform, lightweight, app/applet. Future development tasks are to add ability to save XML, query multiple servers and collate results, and create documentation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    JuMPingSoCketS is a Java Multi Protocol Server Client System (JMPSCS). It is a plugin-oriented communication tool for serveral filetransfer- and chatprotocols for both client and server protocols.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Prototype testbed implementation of the IETF Media Server Control (MEDIACTRL) SIP Control Framework, comprehensive of both control and processing functionality (as in IMS MRF, Media Resource Function).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    A Java Swing GUI for viewing, searching and editing WURFL mobile device information.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Mobup is a J2ME application created by Consultechnology that manages photo uploads on Flickr from a mobile device. It has the possibility to shoot your photo and add title, tags and description; you can add it to sets/groups and post it to your blog.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Net4India Connector for Linux/Windows
    This is a very nice and simple client with GUI to connect to Net4India Broadband Server. This works on Linux/Windows. It also minimizes to notification area. Hover mouse over status icon in notification area and you will get session information.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    PHP Classes to generate voice application. The project now support VXML, SSML, CCXML, N-GRAM and SRGS.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    PhoneBlogger allows you to post to a weblog by phone. PhoneBlogger is written in VoiceXML, Python, and JavaScript.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Ruby Asterisk Gateway Interface (RAGI) is an API for Asterisk in Ruby. THIS PROJECT HAS MOVED TO RUBYFORGE. http://rubyforge.org/projects/ragi/
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    SRFSurvey is a Java application for doing telephone surveys using VoiceXML, and using the SpeakRight Framework for dynamic VoiceXML from Java. SRFSurvey is data-driven by an XML file that specifies the survey questions.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    The SpeakRight Framework is a speech application framework written in Java. SpeakRight applications are fast to create and work on any (VoiceXML) speech platform. Applications are written in Java with full debug and unit testing available.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    For developers who are seeking to integrate SMS functionality into their software or applications, this project offers a range of simple solutions in the form of our SOAP, HTTP and SMTP API's that will allow seamless integration with our systems.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • Next
MongoDB Logo MongoDB