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

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
    Start Free
  • Get the most trusted enterprise browser Icon
    Get the most trusted enterprise browser

    Advanced built-in security helps IT prevent breaches before they happen

    Defend against security incidents with Chrome Enterprise. Create customizable controls, manage extensions and set proactive alerts to keep your data and employees protected without slowing down productivity.
    Download Chrome
  • 1
    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.
    Leader badge
    Downloads: 277 This Week
    Last Update:
    See Project
  • 2
    YetiForce CRM

    YetiForce CRM

    The most affordable CRM system according to Capterra

    Are you looking for a system to boost your sales? Do you want to improve your relationships with customers? Do you want to contribute to the fastest growing open source project on GitHub? You can use YetiForce completely free of charge. With YetiForce’s help you will manage 12 business processes in your company, no matter the size. The vast number of features available for free helped us win the first place in Capterra’s “Most Affordable CRM Software” ranking. YetiForce’s open source code was released under a very flexible and liberal license, which gathers a large and active community around the project. You too can contribute to it no matter if you are a professional programmer or software development is just your hobby. Download YetiForce for free and find out why you should become one of more than 250 000 people who already use it. Testing versions: GitStable: https://gitstable.yetiforce.com/ GitDeveloper: https://gitdeveloper.yetiforce.com/
    Downloads: 35 This Week
    Last Update:
    See Project
  • 3
    Kalkun
    Kalkun is an open source web-based SMS (Short Message Service) manager. It uses Gammu SMSD (part of gammu family) as SMS gateway engine to deliver and retrieve messages from your phone/modem. Documentation is on the wiki: https://github.com/kalkun-sms/Kalkun/wiki Development and source code can be found on github: https://github.com/kalkun-sms/Kalkun/
    Downloads: 10 This Week
    Last Update:
    See Project
  • 4
    Googsystray is a system tray app for Google Voice, GMail, Google Calendar, Google Reader, and Google Docs. It notifies on new messages, alerts, etc., and provides basic services quickly.
    Downloads: 4 This Week
    Last Update:
    See Project
  • Build Securely on Azure with Proven Frameworks Icon
    Build Securely on Azure with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 5
    Kablink
    Kablink open team collaboration software uses social networking to unify team workspaces w/ real-time web conferencing. Collaboration for knowledge networking, program management, communities-of-practice, telework, other business process/functional areas
    Downloads: 3 This Week
    Last Update:
    See Project
  • 6
    The TrainPlanner is a program to find public transport routes with you mobile phone. The plans the application uses have to be added to the MIDLet. To do that there is a J2SE Application where you can create Plans and finaly bundle them to the Midlet.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    Combining readings from a GSM- and GPS device to roughly locate GSM-antennas.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    ViConn is a web-based application used to generate appointments for (financial)advisors by contacting leads/prospects by phone. Appointments can be reported and revenue can be calculated.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    VoiceMail eXtreme is a voicemail interface for the Asterisk PBX. VoiceMail eXtreme uses the MySQL realtime backend for Asterisk.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 10
    VoxForge collects user-submitted speech audio files for the creation of Acoustic Models for Free and Open Source Speech Recognition Engines such as HTK, Julius, ISIP and Sphinx.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    iDate searches via Bluetooth if there are potentially nice dates in your vicinity. You will be notified who is in your vicinity has iDate and whether these people could be a nice date if for each the profile matches the search profile of the other.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • Next
Want the latest updates on software, tech news, and AI?
Get latest updates about software, tech news, and AI from SourceForge directly in your inbox once a month.