Open Source Communications Software

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

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  • 1
    Matroska is an open standard audio/video container format. Visit our homepage at http://www.matroska.org
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    Downloads: 3,855 This Week
    Last Update:
    See Project
  • 2
    basE91 is an advanced method for encoding binary data as ASCII characters. It is similar to UUencode or base64, but is more efficient. The overhead produced by basE91 depends on the input data. It amounts at most to 23% and can range down to 14%.
    Downloads: 19 This Week
    Last Update:
    See Project
  • 3
    libtorrent is a C++ implementation of the BitTorrent protocol with the goals of being efficient and easy to use.
    Downloads: 18 This Week
    Last Update:
    See Project
  • 4
    A Free SOCKS proxy server for Linux, macos and FreeBSD
    Downloads: 21 This Week
    Last Update:
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  • 5
    The program thrulay is used to measure the capacity, delay, and other performance metrics of a network by sending a bulk TCP or UDP stream over it.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 6
    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.
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    Downloads: 3 This Week
    Last Update:
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  • 7
    This is an IRCd based off of bahamut-1.4.35 that includes IPv6 and SSL support. We will be adding more advanced features as well such as host hiding (+x), IRC operator levels, halfops support, more channel modes, etc.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    Qmail NMX is a project that intends to bring commercial features to Qmail, enabling it to manage high volume environments. Features such as scalability, high availability, high volume users, etc... are available to Qmail with this project.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    ACE RADIUS library is a portable open-source implementation of RADIUS protocol, as defined in RFCs 2865 and 2866. It's written in C++ and is supported on a wide variety of POSIX-compliant platforms, including Linux and Solaris, and on Windows.
    Downloads: 0 This Week
    Last Update:
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  • 10
    *Unofficial* patch for DALnet's ircd, currently for version 1.4.36. Provides complete IPv6 and IPv4-in-IPv6 support and SSL support.
    Downloads: 0 This Week
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    See Project
  • 11
    Email2Fax and Fax2Email gateway for Asterisk, that could be integrated to your own existing Asterisk.
    Downloads: 0 This Week
    Last Update:
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  • 12
    A project to employ technologies already applied to the WWW, such as XHTML/CSS, to a distributed VPN grid, allowing for searches of files on the network, and semi-anonymous websites, which are served by all peers with the cached content. Darknet P2P.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    J.Jab. Lite is a lightweight Jabber client written as a Java 1.4.1 applet. Allows users to chat with others on Jabber, AIM, ICQ, MSN, and Yahoo im systems. Has a slimmed down version written in java 1.1.7 that allows simple group chat and moderator access
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    KvMail will be a complete e-mail suite, including access to POP, HTTP, and IMAP servers, written in Ruby with a Tk interface.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15

    MUSCLE

    Client-server networking library

    The MUSCLE system is a fast, portable, flexible client-server system for distributed applications. Clients send BMessage-like PortableMessages to each other either directly or via a centralized server (with built-in database and 'live query' support).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Hey Everyone! Nirvana has moved to http://sourceforge.net/projects/nirvana It isn't here anymore.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Open Source SIP Back to Back User Agent) and Billing system. Has an Embeded TCL interpreter making session control and session mediation limitless in flexibility. Useful for: Routing Engine, Calling Cards, SBC, Peering, Wholesale and more!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Qpopper is the most widely-used server for the POP3 protocol (this allows users to access their mail using any POP3 client). Qpopper supports the latest standards, and includes a large number of optional features.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    C/C++/Java source code library and Build Environment. Contains code for threading, inter-thread communication (ITC), sockets, embedded database, parsing, fileio, etc. The majority of the library is designed for embedded development.
    Downloads: 0 This Week
    Last Update:
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  • 20
    A variant on Undernet-style services for TSora networks.
    Downloads: 0 This Week
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  • 21
    The Solitox Community system provides an integrated real-time chat service, web interface, and a scalable infrastructure for adding more services with common credentials. These interfaces allow a greater level of communication for your users.
    Downloads: 0 This Week
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    See Project
  • 22
    Globe is a middleware platform for developing large-scale (millions of users, worldwide) distributed applications. A number of applications are available, such as GDN: a scalable replacement for FTP and GlobeDoc: a scalable replacement for the WWW.
    Downloads: 0 This Week
    Last Update:
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  • 23
    Common Hardware Recovery Solutions by Ukrainian-Russian network
    Downloads: 0 This Week
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  • 24
    hotwired is a Hotline server for Unix-like operating systems. It aims to implement all the features of the level 2 Hotline protocol (i.e. Hotline > 1.5), including transfer queues, threaded news, and user management.
    Downloads: 0 This Week
    Last Update:
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  • 25
    libaeon is "An Extensible Open Networking library" that attempts to make full use of std syntax and provides classes for data handling, manipulation, streaming, and inheritance while remaining lightweight, fast, and portable.
    Downloads: 0 This Week
    Last Update:
    See Project
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