Open Source Server Operating Systems Communications Software

Communications Software for Server Operating Systems

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

  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
    Start building today
  • Grafana: The open and composable observability platform Icon
    Grafana: The open and composable observability platform

    Faster answers, predictable costs, and no lock-in built by the team helping to make observability accessible to anyone.

    Grafana is the open source analytics & monitoring solution for every database.
    Learn More
  • 1
    WinSCP

    WinSCP

    WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.

    WinSCP is a popular free file manager for Windows supporting SFTP, FTP, FTPS, SCP, S3, WebDAV and local-to-local file transfers. A powerful tool to enhance your productivity with a user-friendly interface and automation options like .NET assembly or batch file scripting. Use WinSCP also for file editing, directory synchronization and site management. WinSCP is open-source and well documented. It is available in English and many other languages.
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    Downloads: 217,988 This Week
    Last Update:
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  • 2
    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server implements multiple spam filters

    The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.
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    Downloads: 41,517 This Week
    Last Update:
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  • 3
    Shareaza

    Shareaza

    A universal P2P file sharing client for Windows

    Shareaza is a very powerful multi-network peer-to-peer file-sharing client supporting Gnutella² G2, Gnutella, eDonkey2000 / eMule, DC++, HTTP, FTP and BitTorrent / DHT protocols for Windows or Wine.
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    Downloads: 1,901 This Week
    Last Update:
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  • 4
    FileZilla®

    FileZilla®

    A fast cross-platform FTP client

    FileZilla® is a cross-platform FTP, SFTP, and FTPS client with a vast list of features, which supports Windows, Mac OS X, Linux, and more. FileZilla's dynamic tools help you move files between your local machine and your Web site's server effortlessly. For example, Filezilla lets you compare your files with in-directory server files to manage file syncing. You can also tab browse between servers and transfer files to them simultaneously, as well as edit server files on the go. And Filezilla is available in 47 languages worldwide!
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    Downloads: 1,769 This Week
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  • Case Management Software for Nonprofits Icon
    Case Management Software for Nonprofits

    CharityTracker offers easy-to-use case management software for nonprofits, helping them track assistance, measure outcomes, and generate reports.

    A case management CRM that focuses on your clients, to measure real-world impact, not just data. Your Day Just Got Shorter - We know you’re busy and don’t have time for complicated software – We’ve changed that! Even your staff will enjoy using the system – No more headaches and missing data from reports so you can use your valuable time to serve more people. CharityTracker is a cloud-based, HIPAA compliant software that’s easy to use for nonprofits of all sizes. With no setup fees, hidden fees, or contracts, you can cancel anytime! Our time saving solution provides a secure way to streamline how you manage cases, record case notes & assistance, create reports, collaborate, set goals, measure outcomes, make referrals & prove your impact with change-over-time reports for your funders. We're at work in 2,200 communities! Book a free demo. Pricing starts at just $20/mo. user
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  • 5
    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: 1,420 This Week
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  • 6
    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: 6,489 This Week
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  • 7
    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/
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    Downloads: 291 This Week
    Last Update:
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  • 8
    gSOAP Toolkit

    gSOAP Toolkit

    Development toolkit for Web Services and XML data bindings for C & C++

    The gSOAP toolkit is an extensive suite of portable C and C++ software to develop XML Web services with powerful type-safe XML data bindings. Easy-to-use code-generator tools allow you to directly integrate XML data in C and C++. Serializes native application data in XML. Includes WSDL/XSD schema binding and auto-coding tools, stub/skeleton compiler, Web server integration with Apache module and IIS extension, high-performance XML processing with schema validation, fast MIME/MTOM streaming, SOAP and REST Web API development, WS-* protocols (WS-Security, WS-Policy, WS-ReliableMessaging, etc), XML-RPC and JSON. Licensed under GPLv2. Visit the developer center with guides, tutorials, and examples at www.genivia.com/dev.html The documentation of the toolkit, libraries, plugins and more is available at www.genivia.com/docs.html Commercial-use licenses and expert technical support services are available at competitive pricing levels, please visit www.genivia.com/products.html
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    Downloads: 240 This Week
    Last Update:
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  • 9
    RapidCRC is a tool for windows for checking and creating CRC32 and MD5 checksums (.sfv/.md5 files). Goal is to use the fastest available (assembly) implementations for this task. Specialty: direct support for CRC32 checksums stored in filenames.
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    Downloads: 128 This Week
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  • Monitor production, track downtime and improve OEE. Icon
    Monitor production, track downtime and improve OEE.

    For manufacturing companies interested in OEE monitoring solutions

    Evocon is a visual and user-friendly OEE software that helps manufacturing companies improve productivity and remove waste as they become better.
    Learn More
  • 10

    bogofilter -- Fast Bayesian Spam Filter

    Fast Bayesian spam filter along lines suggested by Paul Graham

    The bogofilter package implements a fast Bayesian spam filter as suggested by Paul Graham in "A Plan For Spam" <http://www.paulgraham.com/spam.html>. It is written in C. Supported platforms: Linux, FreeBSD, Solaris, OS X, HP-UX, AIX, RISC-OS, ...
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    Downloads: 113 This Week
    Last Update:
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  • 11
    Trojitá, a Qt IMAP e-mail client
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    Downloads: 112 This Week
    Last Update:
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  • 12
    Sipp is a performance testing tool for the SIP protocol. Its main features are basic SIPStone scenarios, TCP/UDP transport, customizable (XML-based) scenarios, dynamic adjustment of call-rate and a comprehensive set of real-time statistics.
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    Downloads: 63 This Week
    Last Update:
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  • 13
    aMSN

    aMSN

    MSN compatible messenger application

    A very nice MSN compatible messenger application, aMSN Messenger is a multiplatform MSN messenger clone. Works pretty much like its Windows based counterpart. Perfect for keeping in touch with those friends who have not yet seen the light. Works on linux
    Downloads: 17 This Week
    Last Update:
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  • 14
    Fast, intelligent, automatic spam detector using Paul Graham style Bayesian analysis of word counts in spam and non-spam emails. Filtering adapts to personal tastes automatically. No manual rule creation required. Intended for use with procmail, maild
    Downloads: 25 This Week
    Last Update:
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  • 15
    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: 18 This Week
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  • 16
    An open implementation of the SS7 core protocols, MTP, SCCP, ISUP, and TCAP.
    Downloads: 47 This Week
    Last Update:
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  • 17
    Seagull is a multi-protocol traffic generator. Especially targeted towards IMS, Seagull supports Diameter (RFC3588 and all applications) over TCP/SCTP and IPv4/IPv6 , TCAP (over SS7 or Sigtran), XCAP over HTTP and Radius.
    Downloads: 13 This Week
    Last Update:
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  • 18
    YetiForce CRM

    YetiForce CRM

    The most affordable CRM system according to Capterra

    Are you looking for a system to boost your sales? Do you want to improve your relationships with customers? Do you want to contribute to the fastest growing open source project on GitHub? You can use YetiForce completely free of charge. With YetiForce’s help you will manage 12 business processes in your company, no matter the size. The vast number of features available for free helped us win the first place in Capterra’s “Most Affordable CRM Software” ranking. YetiForce’s open source code was released under a very flexible and liberal license, which gathers a large and active community around the project. You too can contribute to it no matter if you are a professional programmer or software development is just your hobby. Download YetiForce for free and find out why you should become one of more than 250 000 people who already use it. Testing versions: GitStable: https://gitstable.yetiforce.com/ GitDeveloper: https://gitdeveloper.yetiforce.com/
    Downloads: 6 This Week
    Last Update:
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  • 19
    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: 34 This Week
    Last Update:
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  • 20
    Phex - P2P Gnutella filesharing program

    Phex - P2P Gnutella filesharing program

    A P2P filesharing client which connects to the Gnutella network.

    Phex is a P2P filesharing client which connects to the Gnutella network. It is multi-plattform and malware-free. It offers advanced functionalities and integrates all common Gnutella extensions like multi-source downloads and advanced search features
    Downloads: 11 This Week
    Last Update:
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  • 21
    Mail Alert Simple Mailer

    Mail Alert Simple Mailer

    Mail Alert Simple Mailer

    Mail Alert Simple Mailer is a simple command-line utility designed for IT administrators for sending e-mail from Microsoft Windows OS. It can be executed from command line, Windows batch file or PowerShell scripts. My main reason for writing this software was to handle events generated by Dell OpenManage Server Administrator (OMSA), APC PowerChute and Windows Events to send hardware status and alerts like temperature alerts, UPS battery status, powerline status and RAID controller alerts from monitoring software. It can be used with any other software where you can configure external application to be executed when specific event occurs. Mail Alert Simple Mailer supports SSL and STARTTLS protocols, so it is compatible with many free e-mail providers like GMail, Hotmail, etc. Unlike other simple command line tools it supports ISO-8859-1, ISO-8859-2 and UTF-8 code pages for national characters. Mail Alert Simple Mailer encrypts SMTP password in configuration file.
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    Downloads: 10 This Week
    Last Update:
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  • 22
    Settimino

    Settimino

    Arduino Ethernet library for communicating with S7 Siemens PLC

    Small but efficient communication library that allows your sketches the interfacing with Siemens PLC. Works starting from Arduino UNO with the W5100 ethernet shield.
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    Downloads: 21 This Week
    Last Update:
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  • 23
    libircclient is a small but powerful library, which implements client-server IRC protocol. It has all features needed to create your own IRC client or bot, including multi-threading support, sync and async interfaces, CTCP/DCC support, colors, SSL connections and so on.
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    Downloads: 23 This Week
    Last Update:
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  • 24
    Jabberwocky is a jabber client software for Amiga Computers. It is open source and released under the GNU GPL License.
    Downloads: 14 This Week
    Last Update:
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  • 25
    IRCD-Hybrid

    IRCD-Hybrid

    A lightweight, high-performance Internet Relay Chat server

    IRCD-Hybrid is a lightweight, high-performance Internet Relay Chat server.
    Downloads: 7 This Week
    Last Update:
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