Open Source Communications Software

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

  • Multi-Site Network and Cloud Connectivity for Businesses Icon
    Multi-Site Network and Cloud Connectivity for Businesses

    Internet connectivity without complexity

    As your users rely more and more on Cloud and Internet-based technologies, reliable internet connectivity becomes more and more important to your business. With Bigleaf’s proven SD-WAN architecture, groundbreaking AI, and DDoS attack mitigation, you can finally deliver the reliable internet connectivity your business needs without the limitations of traditional networking platforms. Bigleaf’s Cloud Access Network and plug-and-play router allow for limitless control to and from anywhere your traffic needs to go. Bigleaf’s self-driving AI automatically identifies and adapts to any changing circuit conditions and traffic needs—addressing issues before they impact your users. Bigleaf puts you in the driver’s seat of every complaint and support call with full-path traffic and network performance data, delivered as actionable insights, reports, and alerts.
  • Enterprise AI Search, Intranet, and Wiki in one platform. Icon
    Enterprise AI Search, Intranet, and Wiki in one platform.

    Your company’s all-in-one solution for trusted information

    Cut through the noise and end information overload with Guru, an all-in-one wiki, intranet, and knowledge base that serves as your company's single source of truth.
  • 1
    qBittorrent

    qBittorrent

    A free and reliable P2P BitTorrent client

    An advanced and multi-platform BitTorrent client with a nice Qt user interface as well as a Web UI for remote control and an integrated search engine. qBittorrent aims to meet the needs of most users while using as little CPU and memory as possible.
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    Downloads: 230,423 This Week
    Last Update:
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  • 2

    eMule

    A free peer-to-peer (P2P) file sharing client

    eMule is a free peer-to-peer (P2P) file-sharing client for Microsoft Windows that was launched in 2002 as an alternative to eDonkey2000. To date, eMule is one of the world’s largest and most trustworthy P2P file-sharing clients. eMule includes advanced search features, file checks for corruptions while downloading, a preview while downloading function, and a credit system to reward frequent uploads.
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    Downloads: 15,649 This Week
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  • 3
    Vuze - Azureus

    Vuze - Azureus

    An extremely powerful and configurable BitTorrent client

    Vuze (formerly Azureus) is an extremely powerful and configurable BitTorrent client. Search and download torrent files. Play, convert and transcode videos and music for playing on many devices such as PSP, TiVo, XBox, PS3, iTunes (iPhone, iPod, Apple TV).
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    Downloads: 4,103 This Week
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  • 4
    BeeBEEP (Free Office Messenger)

    BeeBEEP (Free Office Messenger)

    You can message and share files inside your intranet without a server.

    BeeBEEP is a secure (encryption based on Rijndael Algorithm, AES) peer to peer office messenger. You can talk and send files with all your colleagues inside a local area network such of an office, home or internet cafe without a server. BeeBEEP works also with VPNs. This serverless application is indispensable in all those places where privacy and security an essential requirement. For more info visit: https://www.beebeep.net
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    Downloads: 1,964 This Week
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  • Desktop and Mobile Device Management Software Icon
    Desktop and Mobile Device Management Software

    It's a modern take on desktop management that can be scaled as per organizational needs.

    Desktop Central is a unified endpoint management (UEM) solution that helps in managing servers, laptops, desktops, smartphones, and tablets from a central location.
  • 5
    OpenKM Document Management - DMS

    OpenKM Document Management - DMS

    Document Management System and Content Management System

    OpenKM is a electronic document management system and record management system EDRMS ( DMS, RMS, CMS ). It provides modern and flexible architecture that meet today's IT demands, based on open technology (Java, Tomcat, GWT, Lucene, Hibernate, Spring and jBPM), powerful and scalable multiplatform application. OpenKM is a Web 2.0 application that works with Internet Explorer, Firefox, Safari and Opera. Can be configured in major DMBS like Oracle, PostgreSQL and MySQL among others. Due to its technological architecture design, OpenKM meets the document management needs of businesses of all sizes (from SMEs to big corporations). Thanks to its elegant and intuitive interface, OpenKM transforms complex operations into easy tasks. The most relevant functions of OpenKM is the indexing of the most common types of files: text, Office, Office 2007, OpenOffice, PDF, HTML, XML, MP3, JPEG, etc. For a complete feature list take a look at http://goo.gl/au8cQy
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    Downloads: 1,302 This Week
    Last Update:
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  • 6
    MyPhoneExplorer

    MyPhoneExplorer

    Simply explore your Android phone!

    Connect your phone via WiFi, cable or bluetooth and you'll be surprised how easy and efficient it will be to manage your Android based smartphone with our software. Since it's first release MyPhoneExplorer evolved into the most popular freeware tool for smartphones. The software is constantly updated with new features. In opposite to many other solutions MyPhoneExplorer does work complete locally without using any third-party server!
    Downloads: 1,465 This Week
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  • 7
    DC++

    DC++

    A Windows client for the Direct Connect networks

    DC++ is an open source Windows client for the Direct Connect file sharing network. The DC network is a decentralized network, made up of individual servers (hubs) that users join to share files with other members on that hub. Each hub is individually run by a fellow user of the DC network, and may have certain themes to the content on the hub. Hub owners set up rules to regulate their hub as they see fit.
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    Downloads: 1,105 This Week
    Last Update:
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  • 8
    Pidgin IM

    Pidgin IM

    A universal instant messaging (IM) program

    See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.
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    Downloads: 5,779 This Week
    Last Update:
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  • 9
    LAN Messenger

    LAN Messenger

    An intranet chat application that does not require a server.

    LAN Messenger is a p2p chat application for intranet communication and does not require a server. A variety of handy features are supported including notifications, personal and group messaging with encryption, file transfer and message logging.
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    Downloads: 933 This Week
    Last Update:
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  • Total Network Visibility for Network Engineers and IT Managers Icon
    Total Network Visibility for Network Engineers and IT Managers

    Network monitoring and troubleshooting is hard. TotalView makes it easy.

    This means every device on your network, and every interface on every device is automatically analyzed for performance, errors, QoS, and configuration.
  • 10
    SquirrelMail
    SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.
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    Downloads: 468 This Week
    Last Update:
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  • 11
    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: 408 This Week
    Last Update:
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  • 12
    Psi+

    Psi+

    Psi+ Project — development branch of Psi XMPP client

    Psi is a cross-platform powerful XMPP client designed for experienced users. Psi+ is a development branch of Psi XMPP client. Project purpose: collection, refinement and writing new patches for transfer them to Psi upstream developers.
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    Downloads: 663 This Week
    Last Update:
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  • 13

    aria2 - CLI Metalink/BitTorrent client

    A multi-protocol & multi-source, cross platform download utility

    aria2 is a multi-protocol & multi-source, cross platform download utility. The supported protocols are HTTP(S), FTP, BitTorrent, Metalink. It can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth.
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    Downloads: 181 This Week
    Last Update:
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  • 14
    phpMyChat

    phpMyChat

    Standalone chat system developed in php, mysql and javascript

    phpMyChat-Plus is an easy-to-install, easy-to-use multi-room PHP/DB chat. It is currently available for MySQLi, MariaDB, PostgreSQL, and ODBC. It supports IRC-like commands, moderators, is available in 24 languages and fully compatible with php7.
    Downloads: 115 This Week
    Last Update:
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  • 15
    NOCC
    NOCC is a simple and fast Webmail client which can handle POP3 and IMAP mailboxes and sends email via SMTP. It is written with PHP, has low requirements (no database, frames). Features multi-language support, MIME attachments, displays HTML messages. The installation guide comes with the source code: https://sourceforge.net/p/nocc/code/HEAD/tree/trunk/webmail/docs/INSTALL If you encounter problems or bugs you can always try the current HEAD version: https://sourceforge.net/p/nocc/code/HEAD/tarball?path= Questions, bug reports or support requests are very welcome: https://sourceforge.net/p/nocc/_list/tickets Alternative source code repository: https://github.com/oheil/NOCC
    Downloads: 104 This Week
    Last Update:
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  • 16
    forma.lms

    forma.lms

    forma.lms is a Learning Management System (LMS), opensource lms

    forma.lms is an open-source, web-based elearning platform (learning management system - LMS), used to manage and deliver online training courses. It's focused on corporate training needs. The projects forma.lms ((aka formalms) was originally created as a fork of Docebo CE v 4.0.5. The support comnunity of forma.Lms is active on https://forum.formalms.org/
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    Downloads: 97 This Week
    Last Update:
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  • 17
    EiskaltDC++

    EiskaltDC++

    Program for filesharing using Direct Connect and ADC protocols

    EiskaltDC++ is a cross-platform program that uses the Direct Connect and ADC protocols. It is compatible with DC++, FlylinkDC++, LinuxDC++ and other DC clients. EiskaltDC++ also interoperates with all common DC hub software.
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    Downloads: 69 This Week
    Last Update:
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  • 18

    PHP Address Book

    Simple, web-based address & phone book

    Simple, web-based address & phone book, contact manager, organizer. Groups, addresses, e-Mails, phone numbers & birthdays. vCards, LDIF, Excel, iPhone, Gmail & Google-Maps supported. PHP / MySQL based.
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    Downloads: 36 This Week
    Last Update:
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  • 19
    Frost
    Freenet front end written in Java. Supports multiple up/downloads, messages, searching and more.
    Leader badge
    Downloads: 107 This Week
    Last Update:
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  • 20
    Claroline

    Claroline

    Open Source Learning Management System

    Claroline is collaborative learning environment based on PHP/mySQL. It allows teachers or education institutions to create and administer courses through the web. The software provides group management, forums, document repositories, calendar, SCORM,...
    Downloads: 14 This Week
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  • 21
    QmailAdmin is a web interface for managing email addresses in virtual domains created by Vpopmail.
    Downloads: 17 This Week
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  • 22
    Multiuser HylaFAX PHP/MySQL Web interface for viewing faxes online, downloading & emailing in PDF format, and categorizing & archiving all sent and received faxes.
    Downloads: 7 This Week
    Last Update:
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  • 23

    AJAX Chat - Open Source Web Chat

    Fully customizable web chat created using AJAX.

    MOVED: This project has moved to https://github.com/Frug/AJAX-Chat AJAX Chat is a fully customizable web chat implemented in JavaScript, PHP and MySQL which integrates nicely with common forum systems like phpBB, MyBB, PunBB, SMF and vBulletin. A Flash and Ruby based socket connection can be used to boost performance.
    Downloads: 6 This Week
    Last Update:
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  • 24
    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: 9 This Week
    Last Update:
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  • 25
    Owl is a multi user document repository (knowledgebase) , document manager and/or document management system (DMS) written in PHP for publishing of files/documents onto the web for a corporation, small business, group of people, or just for yourself. Final Code Hosted on GitHub
    Downloads: 6 This Week
    Last Update:
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