Open Source Java Communications Software

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

  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

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    MongoDB Atlas runs apps anywhere

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  • 1
    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: 2,397 This Week
    Last Update:
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  • 2
    dcm4che is an implementation of DICOM and IHE actors in Java. Homepage: http://www.dcm4che.org, Google Group: http://groups.google.com/group/dcm4che?hl=en, Wiki: http://www.dcm4che.org/confluence, Issue Tracking: http://www.dcm4che.org/jira
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    Downloads: 1,444 This Week
    Last Update:
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  • 3
    DavMail POP/IMAP/SMTP/Caldav to Exchange
    DavMail is a POP/IMAP/SMTP/CalDAV/CardDAV/LDAP Exchange and Office 365 gateway allowing users to use any mail/calendar client (e.g. Thunderbird with Lightning or Apple iCal) with an Exchange server. DavMail now includes an LDAP gateway to Exchange global address book and user personal contacts to allow recipient address completion in the mail compose window and full calendar support with attendee free busy display. The main goal of DavMail is to provide standard compliant protocols in front of proprietary Exchange. This means LDAP for address book search, SMTP to send messages, IMAP to browse messages on the server in any folder, POP to retrieve inbox messages only, CalDAV for calendar support and CardDAV for contact synchronization.
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    Downloads: 820 This Week
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  • 4
    winPenPack

    winPenPack

    The portable software collection

    winPenPack is a project that aims at collecting the most frequently used and most popular open source applications made portable, so that they can be executed without installation from any USB Flash Drive or Hard Disk. The winPenPack suites offer a wide range of portable applications like office tools, internet tools, multimedia tools, development tools, security applications and other frequently used utilities. Everything you need, completely free, open source and portable!
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    Downloads: 483 This Week
    Last Update:
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  • Demo Series - Small Business Backup By Veeam Icon
    Demo Series - Small Business Backup By Veeam

    Learn how to protect your Microsoft 365 data, with simple, actionable tips today.

    Watch this on-demand demo series and learn how to protect your Microsoft 365 data with clear, simple, actionable steps that are easy to implement for businesses of all sizes.
    Watch Demo Series
  • 5
    FrostWire

    FrostWire

    Search, Download, Play, Share on Bittorrent and the cloud

    FrostWire https://www.frostwire.com/ is a media player, Video Downloader and Peer to Peer (P2P) information sharing client for the BitTorrent network. This project is not affiliated with LimeWire LLC. FrostWires' source code is Licensed under the GNU GPL and Apache Open Source licenses. System Requirements Any of the following operating systems: ● Windows 10, 8, 7, Vista for Intel processors (64-bit only) ● Mac OS X 10.11 (El Capitan) or later (64-bit) ● Linux, Unix such as Solaris (64-bit) ● Android 7.0 or later 256 MB of RAM (512 MB Recommended) An active internet connection
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    Downloads: 308 This Week
    Last Update:
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  • 6
    mendelson AS2

    mendelson AS2

    Implementation of the EDIINT AS2 protocol (RFC 4130)

    mendelson AS2 is the JAVA-based open source EDIINT AS2 solution. Monitoring- and configuration GUI, async & sync MDN, signatures, encryption, TLS, web interface, pluggable into any servlet container, partner manager, certificate manager, data compression, optional profiles: MA, FN. Localized to Spanish, Italian, Portuguese, German, English, French, Polish
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    Downloads: 347 This Week
    Last Update:
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  • 7

    UPnP PortMapper

    Manage port forwardings via UPnP

    The UPnP PortMapper can be used to easily manage the port mappings/port forwarding of a UPnP enabled internet gateway/router in the local network.
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    Downloads: 186 This Week
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  • 8
    OpenAS2

    OpenAS2

    AS2 1.1 server implementation in Java

    OpenAS2 is a java-based implementation of the EDIINT AS2 standard. It is intended to be used as a server. It is extremely configurable and supports a wide variety of signing and encryption algorithms. Supports very high traffic volume allowing parallel processing of files per partner. SUPPORT: Please use the Github issues and Discussions channels here: https://github.com/OpenAS2/OpenAs2App/ Requirements: - Java 17 or newer (tested with the LTS versions of Java up to 25) - Any OS that runs Java Planned enhancements in the next major release: - User interace configuration GUI - Certificate Exchange Management IMPORTANT: Java 8 is no longer supported.
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    Downloads: 121 This Week
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  • 9
    Alfresco Community Edition

    Alfresco Community Edition

    Open Source Enterprise Content Management ECM

    The open source Enterprise Content Management (ECM) software that handles any type of content, allowing users to easily share and collaborate on content.
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    Downloads: 99 This Week
    Last Update:
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  • Paessler - Monitor Your Whole Network in Minutes Icon
    Paessler - Monitor Your Whole Network in Minutes

    Auto-discovery finds your devices and deploys pre-configured sensors instantly. No project plan required, just visibility from day one.

    Waiting weeks for a monitoring rollout isn't an option when infrastructure doesn't stop running. PRTG's auto-discovery scans your network and suggests from over 200 pre-configured sensor types, so you're watching servers, applications and devices within minutes, not after a multi-week deployment. Enterprise-strength monitoring, without the enterprise complexity. Start your free trial today.
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  • 10
    NoiseGator (Noise Gate)

    NoiseGator (Noise Gate)

    A simple noise gate app intended for use with VOIPs like Skype.

    Ever wanted to cut out background noise when talking with others on Skype? Now it's possible! NoiseGator is a light-weight noise gate application that routes audio through an audio input to an audio output. In real-time the audio level is analysed and if the average level is higher than the threshold the audio bypasses as normal. However, if the average level goes below the threshold, the gate closes and the audio is cut. When used with a virtual audio cable it can act as a noise gate for a either a sound input(microphone) or sound output(speakers). Can also be used to gate noise from your own mic or play your microphone through your speakers. REQUIREMENTS: - Java 7 or higher for Windows. - Java 6 or higher for Mac. Java 7 recommended. - A virtual audio cable is required for use with VOIPs: For Windows users I recommend the VB-Cable driver (http://vb-audio.pagesperso-orange.fr/Cable/index.htm). Mac users can use SoundFlower.
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    Downloads: 186 This Week
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  • 11
    WireShare
    Formerly entitled LimeWire Pirate Edition(LPE), WireShare is the newest fork of the original LimeWire open source project. Our sole intention is to create and maintain a bona fide continuation of the project. All work is undertaken on a pro bono basis. The name was changed for legal reasons.
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    Downloads: 177 This Week
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  • 12
    MsgViewer
    MsgViewer is email-viewer utility for .msg e-mail messages, implemented in pure Java. MsgViewer works on Windows/Linux/Mac Platforms. Also provides a java api to read mail messges (msg files) programmatically.
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    Downloads: 87 This Week
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  • 13
    FileBot

    FileBot

    The ultimate TV and Movie Renamer / Subtitle Downloader

    FileBot is the ultimate tool for renaming your movies, tv shows or anime and downloading subtitles. It's smart, streamlined for simplicity and just works. FileBot supports Windows, Linux and Mac, plus there's a full-featured command-line interface for all sorts of automation.
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    Downloads: 51 This Week
    Last Update:
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  • 14
    SSVNC adds encryption security to VNC. It provides a GUI for Windows, MacOSX, and Unix that automatically starts up an SSL or SSH tunnel for connections to any VNC server. It also supports VeNCrypt encryption. The Unix viewer has many new features.
    Downloads: 38 This Week
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  • 15
    BigBlueButton

    BigBlueButton

    A complete web conferencing system for virtual classes and more!

    BigBlueButton is an open-source virtual classroom platform built to help teachers teach and learners learn online. It enables real-time collaboration through audio, video, slide presentations, screen sharing, and interactive whiteboards. Educators can actively engage students using polls, emojis, shared notes, multi-user whiteboards, and breakout rooms. The platform includes a Learning Analytics Dashboard that provides moderators with live insights into participant activity and engagement. BigBlueButton also supports session recording and playback, making it ideal for asynchronous learning and content reuse. Designed primarily for education, it adapts seamlessly to online tutoring, flipped classrooms, group collaboration, and large-scale virtual classes.
    Downloads: 32 This Week
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  • 16
    Makagiga

    Makagiga

    To-do manager, notepad, RSS reader...

    Makagiga is an open-source, easy-to-use, portable application for doing a variety of tasks, such as todo listing, text editing, or RSS reading. Plugins are used to implement its various capabilities.
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    Downloads: 24 This Week
    Last Update:
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  • 17
    Frost
    Freenet front end written in Java. Supports multiple up/downloads, messages, searching and more.
    Downloads: 62 This Week
    Last Update:
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  • 18
    Untangle
    Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com
    Downloads: 17 This Week
    Last Update:
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  • 19
    Apple Disk Transfer ProDOS

    Apple Disk Transfer ProDOS

    Transfer disks and disk images between the Apple II and the real world

    Apple Disk Transfer ProDOS (ADTPro) transfers classic 8-bit Apple disk images over a serial, ethernet or audio link to a more modern computer. Based on the seminal ADT, ADTPro can transfer any ProDOS- or SOS-visible volume.
    Downloads: 17 This Week
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  • 20
    LogicMail for BlackBerry
    LogicMail is a standalone E-Mail client designed to run on RIM BlackBerry handheld devices, providing full support for IMAP, POP, and SMTP over the device's Internet connection. Its exists to provide an alternative to the service-oriented "push" E
    Downloads: 15 This Week
    Last Update:
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  • 21
    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%.
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    Downloads: 64 This Week
    Last Update:
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  • 22
    XNap is a Java plugin-based peer-to-peer (P2P) framework and client including an OpenNap plugin with multiple server support, as well as Gnutella, giFT (OpenFT), IRC, ICQ and an OverNet plugin. XNap provides resuming, chat, hotlist and a media library.
    Downloads: 30 This Week
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  • 23
    Java API to send SMS and WAP Push messages using Kannel SMS/WAP Gateway
    Downloads: 17 This Week
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  • 24
    Chatty

    Chatty

    A Twitch Chat Client

    Chatty is a Twitch Chat Client for everyone who wants to try something different than the Webchat but doesn't want to miss out on many of the Twitch specific features.
    Downloads: 10 This Week
    Last Update:
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  • 25
    NFC is a scalable, distributed chat server and client implemented in Java. Notable features include built in load balancing and HTTP-tunneling support. Using the load balancing, a distributed network of servers can be formed, similar to an IRC network.
    Downloads: 37 This Week
    Last Update:
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