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Open Source Communications Software

Communications Software

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

  • Monitor your whole IT Infrastructure Icon
    Monitor your whole IT Infrastructure

    Know what's up and what's new: Monitor all your systems, devices, traffic and applications.

    Caters to tech staff, system Administrators, and companies of any size, from small and medium sized businesses to enterprises that need their IT network to be reliable and easy to monitor in real-time. Equipped with an easy-to-use, intuitive interface with a cutting-edge monitoring engine. PRTG optimizes connections and workloads as well as reducing operational costs by avoiding outages while saving time and controlling service level agreements (SLAs).
    Start Your Free PRTG Trial Now
  • Cloud data warehouse to power your data-driven innovation Icon
    Cloud data warehouse to power your data-driven innovation

    BigQuery is a serverless and cost-effective enterprise data warehouse that works across clouds and scales with your data.

    BigQuery Studio provides a single, unified interface for all data practitioners of various coding skills to simplify analytics workflows from data ingestion and preparation to data exploration and visualization to ML model creation and use. It also allows you to use simple SQL to access Vertex AI foundational models directly inside BigQuery for text processing tasks, such as sentiment analysis, entity extraction, and many more without having to deal with specialized models.
    Try for free
  • 1
    Matroska is an open standard audio/video container format. Visit our homepage at http://www.matroska.org
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    Downloads: 364 This Week
    Last Update:
    See Project
  • 2
    MLDonkey is a multi-platform multi-network peer-to-peer client.
    Downloads: 82 This Week
    Last Update:
    See Project
  • 3
    FreePOPs is a webmail to pop3 conversion daemon. It is extensible to support other webmail using the scripting language LUA. See the homepage for supported webmails.
    Downloads: 13 This Week
    Last Update:
    See Project
  • 4
    This project has been superseded by OpalVoip (https://sourceforge.net/projects/opalvoip/) and H323Plus (https://sourceforge.net/projects/h323plus/) The OpenH323 project provides full featured, interoperable, Open Source implementation of the ITU H.323 teleconferencing protocol that can be used by personal developers and commercial users without charge.
    Downloads: 22 This Week
    Last Update:
    See Project
  • Powering the best of the internet | Fastly Icon
    Powering the best of the internet | Fastly

    Fastly's edge cloud platform delivers faster, safer, and more scalable sites and apps to customers.

    Ensure your websites, applications and services can effortlessly handle the demands of your users with Fastly. Fastly’s portfolio is designed to be highly performant, personalized and secure while seamlessly scaling to support your growth.
    Try for free
  • 5
    climm is a portable, small, yet powerful console based, fully internationalized instant messaging client supporting the current v8 ICQ protocol and XMPP.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 6
    YSM is a simple ICQ client based on the v7/v8 icq protocol version. Free of external libraries requirements, written in the C Language.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 7
    ShareDaemon is a multi-platform filesharing client for eDonkey2000 network. Designed in clean modular setup with separated networking and interface code, ShareDaemon runs on Windows, Linux, BSD, Solaris and Mac OS X platforms.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 8
    BMForum is a open source forum based on PHP & MySQL. BMForum is a powerful forum with AJAX,Tags,RSS and more Web 2.0 Technology.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 9
    liberopops is useful for users of Libero provider who cannot read email due to its change of policy. It acts as a POP3 server which interfaces itself to the webmail service still available.
    Downloads: 5 This Week
    Last Update:
    See Project
  • The CRM you’ll want to use every day Icon
    The CRM you’ll want to use every day

    With CRM, Sales, and Marketing Automation in one, Act! gives you everything you need for happier clients, more revenue, and less stress.

    Act! Premium is perfect for small and midsize businesses looking to market better, sell more, and create customers for life. With unparalleled flexibility and freedom of choice, Act! Premium accommodates the unique ways you do business. Whether it’s customizations to fit your specific business or industry processes or your preferences for deployment and access, the possibilities with Act! Premium are limitless.
    Learn More
  • 10
    An IRC client that uses Tcl for not only the scripting, but also the "glue" at the C level for how all the parts of the application fit together.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 11
    BIM is a Java based AOL Instant Messenger (AIM) Client featuring a full feature Swing GUI. BIM also comes with encryption support. It has a small code base (617KB w/encryption libs) and can be easily dropped and run on wide array of operating systems.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 12
    Rich Features IRC Services, the project is resumed 2010
    Downloads: 1 This Week
    Last Update:
    See Project
  • 13
    Revival/2k is a modular BBS/suite of internet servers and a web-site management system. It consists of multiple web applications (forums, mail, login, etc), internet servers (NNTP, POP3, etc) and a Telegard/Renegade styled telnet server all interacting
    Downloads: 1 This Week
    Last Update:
    See Project
  • 14
    C64/65/128 networking software for FreeBSD, Linux, Amiga, Solaris, BeOS and Windows.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 15
    This program is desgined to allow the user to download files off the internet quickly from a console environment. It is written in java and therefore should work on any platform. Main features are: - Small File Size - resume function
    Downloads: 1 This Week
    Last Update:
    See Project
  • 16
    Rolodap is a LDAP based contacts directory/manager. It uses a shared directory, but presents itself to users as a series of individually defined address books.Simplicity of end use is a primary goal. Rolodap integrates with emailers that support LDAP.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 17
    AServ is a fully featured IRC Service written in TCL to provide stable services to both network operators, and users. AServ uses Undernets P10 protocol to communicate with servers. Bugs and Requests should be made at http://AServ.ownage.org.uk
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    BScribbles strives to improve any PHP webpage. Its transparent integration is painless to configure and install. Once in place, any visitor will be able to scribble (post) to a board using a simple, non obtrusive interface. Freely Provided under the GPL!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    BPALogin is a replacement for the Telstra supplied client for connecting and using Telstra's Big Pond Advance powered by Cable.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Direct connect client and server. It will be possible to run our server on a Linux computer and remotely control the server through the clients which will be able to run on Win/Linux/Mac. The downloads are arriving to the server computer.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Cicerone is a multi-platform, multi-server, multi-database, web-based corporate information system like no other. Completely web-driven and accessible through any 4.x web browser, Cicerone allows your company to create and maintain information on the fly
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Allo stato attuale Internet non sara totalmente libera fintantochč non saranno completamente libere ed accessibili le strutture fisiche che lo trasportano.CityLAN vuole essere il manifesto di questa libertŕ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Contest-Log will be used to log and evaluate radio communications during an amateur radio UKW contest.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    DIEGO is a streaming mp3 server written in JAVA. It creates a socket connection on your local machine and listens for HTTP requests. It serves up dynamic m3u playlists which are read by WinAmp, which in turn streams the mp3 to your computer.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Diom Webmail is a webmail client written in PHP to interact with an IMAP server. Diom Webmail is easily configurable, with common features like sending and recieving messages and attachements, as well as an address book, and spell check.
    Downloads: 0 This Week
    Last Update:
    See Project
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