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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.

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

    MongoDB Atlas provides built-in vector search and a flexible document model so developers can build, scale, and run gen AI apps without stitching together multiple databases. From LLM integration to semantic search, Atlas simplifies your AI architecture—and it’s free to get started.
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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
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  • 1
    Moodle

    Moodle

    A free course management system (CMS) to create online learning sites

    Moodle is a Course Management System (CMS), also known as a Learning Management System (LMS) or a Virtual Learning Environment (VLE). It is a Free web application that educators can use to create effective online learning sites. https://moodle.org/
    Leader badge">
    Downloads: 566 This Week
    Last Update:
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  • 2
    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. Previously is was a sort of fork but now just consider it as a space for nightly builds.
    Leader badge">
    Downloads: 504 This Week
    Last Update:
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  • 3
    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.
    Leader badge">
    Downloads: 76 This Week
    Last Update:
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  • 4
    GeoNetwork opensource - Metadata Catalog
    A web based Metadata Catalog Server for data description and discovery. Supports both generic and geospatial data discovery. It implements international standards (e.g. ISO19115/19139/19119, ISO19115-3, DCAT-AP, CSW 2.0, OGC API Records). It originates from the United Nations and is used by many governments as geoportal software. Active development and discussion takes place on GitHub and OSGeo Discourse. You can also connect directly with the companies supporting the development. Source code available on github https://github.com/geonetwork/
    Leader badge">
    Downloads: 125 This Week
    Last Update:
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  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
    Learn More
  • 5
    eMule Plus
    eMule Plus is an evolution of the original eMule project, created to improve its abilities and features, in both work efficiency and user interface.
    Downloads: 56 This Week
    Last Update:
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  • 6
    Mibew Messenger 1.x
    "Mibew Messenger" - is unique software allowing visitors of your site to chat with your operators. This repo should be treated as an obsolete. For modern version of Mibew Messenger see https://sourceforge.net/projects/mibew/
    Downloads: 4 This Week
    Last Update:
    See Project
  • 7
    snownews

    snownews

    RSS feed reader

    A text mode reader for RSS and Atom feeds.
    Downloads: 15 This Week
    Last Update:
    See Project
  • 8
    Mibew Messenger 3
    Mibew Messenger is an open-source live support application allowing visitors of your site to chat with your operators.
    Leader badge">
    Downloads: 5 This Week
    Last Update:
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  • 9
    ReloadCMS is a free CMS written on PHP and based on flat files. It does not need any DB installed(!) and realise all abilities of high-level CMS like modularity, templates, users management, advanced rights system and package of main modules.
    Downloads: 1 This Week
    Last Update:
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  • 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.
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  • 10
    Belarusian localization of Mozilla Application Suite, Mozilla Firefox, Mozilla Thunderbird, SeaMonkey.
    Downloads: 0 This Week
    Last Update:
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  • 11
    HomeLAN Bill is a billing system for home networks and ethernet-based internet service providers. Home page: http://hlbill.sourceforge.net
    Downloads: 0 This Week
    Last Update:
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  • 12
    LimeSurvey - the Online Survey Tool

    LimeSurvey - the Online Survey Tool

    The leading Open Source survey tool

    LimeSurvey is a survey software to create online surveys. Features open/closed surveys, branching, participant administration, quotas, WYSIWYG HTML editor, email invitations & reminders, assessments, basic statistics and more.
    Downloads: 0 This Week
    Last Update:
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  • 13
    eZebra is a new p2p program with functions similar at eMule and Shareaza but we do not take it as a MOD of any of both. We understand it as "the start point of a new p2p generation". And we need you to make us believe we can do better!
    Downloads: 0 This Week
    Last Update:
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  • 14
    Maximum 15 characters. Unix name is available. 47 characters. Must be between 20 and 250 characters.
    Downloads: 0 This Week
    Last Update:
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