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

  • 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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  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

    NVIDIA L4 GPUs. 5-second cold starts. Scale to zero when idle.

    Deploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
    Start Free
  • 1
    ZK - Simply Ajax and Mobile
    ZK is an open-source Java framework for building modern web and mobile applications. It enables developers to create rich, interactive UIs using only Java — no JavaScript required. With 200+ Ajax-powered components, event-driven architecture, and support for popular technologies like Spring, Java EE, and JSP/JSF, ZK makes it simple to deliver powerful and user-friendly web applications.
    Downloads: 14 This Week
    Last Update:
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  • 2
    Portable and very simple C API functions to write a soap client/server in c.
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    Downloads: 78 This Week
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  • 3
    IIPImage

    IIPImage

    IIPImage is an advanced high-performance image server and client

    IIPImage is a high performance image server and client for viewing, navigating and zooming within high resolution images on the internet. Images in TIFF or JPEG2000 format are efficiently streamed by the server to a choice of clients that can be embedded within a web page.
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    Downloads: 11 This Week
    Last Update:
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  • 4
    tinyREST

    tinyREST

    Small Java based REST server

    TinyREST allows a Java programmer to easily create a REST server without having to install a J2EE server. Creating a new server is as easy as copying the service jar, setting up a configuration file and writing your own service handler class. The resulting project can be made to start up as a service. Annotations can now be used to write handler class and methods. JDBC database access as well as file system access is allowed from the service.
    Downloads: 13 This Week
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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.
    Start Free 30-Day Trial
  • 5
    OpenVPN ALS is a web-based SSL VPN server written in Java. It has a browser-based AJAX UI which allows easy access to intranet services. OpenVPN ALS is a direct descendant of Adito, which was a fork of SSL-Explorer.
    Downloads: 4 This Week
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  • 6
    iTorrent allows you to download BitTorrent podcasts from iTunes. It transforms BitTorrent podcasts so that you can update them just like any other podcast in iTunes.
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    Downloads: 11 This Week
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  • 7
    The Shared desktop ontologies provide RDF vocabularies for the Semantic Desktop. This includes basic ontologies like RDF and RDFS and all the Nepomuk ontologies like NRL, NIE, or NFO which are also maintained and developed in this open-source project
    Downloads: 10 This Week
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  • 8
    MultiXTpm Application Server is FREE SOFTWARE, It is a Message Oriented Middleware (MOM) and Transaction Processing (TP) Monitor. It provides the runtime environment and rich API for developing large, scalable distributed applications for OLTP.
    Downloads: 12 This Week
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  • 9
    Chaski App

    Chaski App

    Chaski is a content aggregator that helps you focus on what matters.

    Chaski is a content aggregator designed to help you cut through the noise of today's internet. With its privacy-first approach, Chaski provides a simple, distraction-free space where you can consume the content that truly matters to you. Whether you're following articles, videos, or other online media, Chaski ensures you can access it all in one place—without the interruptions of ads, tracking, or irrelevant distractions. Key Features: Privacy-First: No ads, no tracking, and no data leaving your device. Your content consumption is fully private. Minimalist Design: A clean, intuitive interface that focuses on the content, giving you a seamless reading or viewing experience. Customizable Experience: Personalize your feeds, choose your themes, and adjust fonts to create the perfect environment for consuming content. Feed Aggregation: Bring together your favorite content from across the web, organizing it in folders or accounts for easy access. Offline Reading
    Downloads: 11 This Week
    Last Update:
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  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

    BigQuery automates data prep, analysis, and predictions with built-in AI assistance.

    Build and deploy ML models using familiar SQL. Automate data prep with built-in Gemini. Query 1 TB and store 10 GB free monthly.
    Start Free
  • 10
    HelloNzb

    HelloNzb

    The Binary Usenet Tool

    With HelloNzb you can download (binary) files from Usenet servers via NZB index files. The software is based on Java and can thus run on many platforms (tested on Windows and Linux). Automatic archive verification via PAR2, automatic RAR archive extraction, built-in yEnc- and UU-decoding. Portable, no installation required.
    Downloads: 2 This Week
    Last Update:
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  • 11
    SoapUI
    The SoapUI download has moved to https://www.soapui.org/downloads/soapui/source-forge.html With more than 9 million downloads SoapUI is the de-facto standard for REST and SOAP API functional, security and performance testing.
    Downloads: 2 This Week
    Last Update:
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  • 12
    Be4gle is a web services layer for MySQL that exposes the database as a SOAP server. HTML forms and a generic JavaScript soap client are generated from XML templates enabling client side data binding and event-driven web applications (AJAX).
    Downloads: 8 This Week
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  • 13
    Cloudy is a open source cloud development environment, based on Mozilla Bespin. If somebody is interested in helping with this project, just email me.
    Downloads: 8 This Week
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  • 14
    FreeRDP is a free remote desktop protocol client that implements RDP following the documentation provided under the Microsoft Open Specification Promise.
    Downloads: 2 This Week
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  • 15
    mendelson AS4

    mendelson AS4

    AS4 Solution for ENTSOG, e-SENS, ebMS, PEPPOL, ICS2, BDEW

    mendelson AS4 is a free JAVA-based open source AS4 solution. Contains a monitoring- and configuration GUI (SWING), supports PUSH and PULL messages, ENTSOG AS4, e-SENS AS4, ebMS AS4, BDEW AS4, PEPPOL AS4, ICS2 AS4, signatures (SOAP, payload), selectable profile per trading partner, encryption (SOAP, payload), UserNameToken, TLS, pluggable into any servlet container, trading partner management, compression, certificate management
    Downloads: 6 This Week
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  • 16
    CalemEAM is an open source enterprise asset management (EAM/CMMS) suite, featuring Web 2.0 Ajax client with drag-and-drop customization and a PHP based server. This free CMMS/EAM project can be used for industrial, facility and IT asset management.
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    Downloads: 3 This Week
    Last Update:
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  • 17
    wsdlpull is an efficient and powerful command line utility for dynamic inspection and invocation of WSDL web services.It provides a C++ library with dynamic WSDL invocation API,WSDL parser,Schema parser and Validator and an xmlpull Parser/Serializer.
    Downloads: 5 This Week
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  • 18
    Client libraries written in C# for text-based internet protocols (so far including NNTP and Dict). These libraries are designed to reflect the RFCs of their respective protocols. With the release of the MS WCF, this project is effectively obsolete.
    Downloads: 4 This Week
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  • 19
    A server-side web-based AJAX-enabled RSS/Atom feed aggregator/news tracking tool. Requires PHP 4/5 and MySQL 4/5. Can host on Windows/Linux/BSD/MacOSX and browse on IE6/IE7/Firefox/Safari/Chrome/et al. See our web site for more details.
    Downloads: 1 This Week
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  • 20
    Gateway Anti-Virus allows applications across the enterprise to check files for viruses by providing a SOAP-based virus scanning web service. The system uses clamav for virus definitions and detection.
    Downloads: 2 This Week
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  • 21
    Jitterbit is an open source integration tool that delivers a quick and simple way to design, configure, test, and deploy integration solutions. It supports many document types and protocols: XML, web services, database, LDAP, text, FTP, HTTP(S), file
    Downloads: 2 This Week
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  • 22
    A dialect of XUL implementing most of Mozilla XUL's Fourth Draft. XML User Interface Language (XUL) is a method for easily creating GUI applications. Lux XUL supports Python scripting via Jython 2.1.
    Downloads: 3 This Week
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  • 23
    WebLOAD
    This project is intended for ISVs, SIs and software developers who need to integrate load generation engine into their applications. For enterprise load and performance testing initiatives, RadView offers WebLOAD Professional, a complete solution for creating, executing and analyzing the performance of web applications under load.
    Downloads: 3 This Week
    Last Update:
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  • 24
    Easy Feed Editor
    ACTIVE DEVELOPMENT ENDED IN 2011. Use Easy Feed Editor to create your own feed. Easy Feed Editor supports both RSS and ATOM.
    Downloads: 1 This Week
    Last Update:
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  • 25
    Reference implementation for the MTOSI interface standard defined by the TMF.
    Downloads: 2 This Week
    Last Update:
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