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

  • 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.

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    Build Data Resilience - Take the Assessment Today

    Can you recover when it matters most? Take this quick assessment to identify gaps and build greater recovery confidence.

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  • 1
    The portable Universal Plug and Play (UPnP) SDK provides support for building UPnP-compliant control points, devices, and bridges on several operating systems. The main repository is at GitHub in https://github.com/pupnp/pupnp. This is just a clone repository for legacy reasons. Old SourceForge repo: git://pupnp.git.sourceforge.net/gitroot/pupnp/pupnp
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    Downloads: 4,837 This Week
    Last Update:
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  • 2
    Vienna

    Vienna

    An open source Mac OSX RSS reader with support for RSS/Atom feeds

    Vienna is an open source Mac OSX RSS reader with support for RSS/Atom/JSON feeds, article storage and management via a SQLite database, written in Objective-C and Cocoa. Feeds can be accessed directly, or through a syncing service supporting the Open Reader API, like BazQux.com, FreshRss.org, FeedHQ.org, InoReader.com or TheOldReader.com. Development now happens on GitHub: https://github.com/ViennaRSS/vienna-rss
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    Downloads: 287 This Week
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  • 3
    RSS-Bridge

    RSS-Bridge

    The RSS feed for websites missing it

    The RSS feed for websites missing it.
    Downloads: 3 This Week
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  • 4
    Portable and very simple C API functions to write a soap client/server in c.
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    Downloads: 64 This Week
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  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

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  • 5
    NetNewsWire

    NetNewsWire

    RSS reader for macOS and iOS

    NetNewsWire is a free and open source RSS reader for Mac, iPhone, and iPad. NetNewsWire shows you articles from your favorite blogs and news sites and keeps track of what you’ve read. This means you can stop going from page to page in your browser looking for new articles to read. Do it the easy way instead: let NetNewsWire bring you the news. And, if you’ve been getting your news via Facebook and Twitter, with their ads, algorithms, user tracking, outrage, and misinformation, you can switch to NetNewsWire to get news directly and more reliably from the sites you trust.
    Downloads: 1 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: 14 This Week
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  • 7
    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: 4 This Week
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  • 8
    RSS Feed Widget

    RSS Feed Widget

    Zero-dependency RSS feed widget. Vanilla JS, dark mode, filtering.

    RSS Feed Widget transforms any RSS feed into a responsive card grid with a single function call. Built with vanilla JavaScript, it requires no frameworks, no build tools, and no dependencies. Drop two files into your project, call RSSWidget.init() with a feed URL, and you get a polished card layout with category filtering, skeleton loading, and automatic dark mode support. Every category badge gets a deterministic color generated from its name. Descriptions truncate at word boundaries. Dates format cleanly. Cards animate in with a staggered entrance. The entire widget is WCAG AA compliant and respects prefers-reduced-motion. Supports direct fetching for CORS-enabled feeds and configurable proxy fallback for feeds without CORS headers. Themeable via CSS custom properties so it adapts to any design system. Under 7KB gzipped. MIT licensed. Default demo powered by how-to-do.net.
    Downloads: 8 This Week
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  • 9

    WendzelNNTPd

    A free Usenet server with SQL backend and RBAC.

    The WendzelNNTPd is a IPv6-ready NNTP usenet-server with the main goal to be as easy to use as possible. It is portable (Linux/*BSD/*nix), supports AUTHINFO authentication, contains ACL as well as role based ACL and supports invisible newsgroups. It currently supports MySQL and SQLite backends.
    Downloads: 6 This Week
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  • Ship Agents Faster Icon
    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
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  • 10
    Galleon is a home media server using TiVo's discontinued HME protocol. It only works on TiVo versions earlier than 20.7.2. The project is not actively maintained. If you want to maintain it, contact the admins.
    Downloads: 2 This Week
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  • 11
    R3R
    R3R is a small, fast, and portable reader for RSS, ESF, and Atom feeds.
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    Downloads: 5 This Week
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  • 12
    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: 4 This Week
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  • 13

    mYLastRSS

    PHP class to parse and merge several feeds

    PHP class to parse several feeds at same time and give ordered result. Support RSS 0.9x/1.0/2.0, RDF, and Atom. Support some namespaced modules like Media RSS, iTunes, Dublin Core, and more... Include class to make RSS rewriting or filtering.
    Downloads: 2 This Week
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  • 14
    AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.
    Downloads: 1 This Week
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  • 15
    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: 1 This Week
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  • 16
    Af-Arch is an Open Source N-tier framework to build distribuited applications. Its license schema allows Open Source and commercial (closed source) applications. This is the foundation to build an new set of applications in a fast and reliable way.
    Downloads: 1 This Week
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  • 17
    BalloonRSS

    BalloonRSS

    RSS aggregator that displays messages as balloon tooltips.

    This is a simple RSS aggregator that displays incoming messages as balloon tooltip pop-ups in the windows task bar. The news entries themselves are linked to be read with the browser.
    Downloads: 1 This Week
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  • 18
    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: 1 This Week
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  • 19
    Qtopia based RSS/Podcast Aggregator for PMA400 and other mobile devices
    Downloads: 1 This Week
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  • 20
    It is a lightweight API to invoke web services (RMI, CORBA, WebService (SOAP), XML-RPC, EJB, Hessian, Burlap, REST, ...), how simple Java Object calls. You can integrate Crispy in a Service Oriented Architecture (SOA) or in a Rich Client Platform (RCP).
    Downloads: 1 This Week
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  • 21
    This is an archive of the PowerBlog blogging desktop software application. PowerBlog is no longer supported as of 2005 and stopped working when incompatibilities came with .NET Framework v2 and Internet Explorer (which was used for WYSIWYG HTML editing). PowerBlog was a powerful and intuitive Windows desktop blogging application. One could post blog entries to an XML-RPC/Blogger API host, FTP host, or other host. It was extensible using .NET assemblies or by using VBScript/JScript scripts. It had an Outlook-style article browsing interface. PowerBlog's closest competitor was w.Bloggar until Microsoft Live Writer was released, which made PowerBlog an irrelevant product. If you are curious about PowerBlog's author and what he is up to, visit http://www.jondavis.net/techblog Feel free to send Jon a message at jon -AT- jondavis-dot-net (<< anti-spam) asking him what he's been up to with blogging solutions lately.
    Downloads: 1 This Week
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  • 22
    Pyris is a completely customizable blogging tool with RSS, a photo album, and much more! It is written in PHP and generates valid XHTML 1.0 Strict pages. It also archives old entries to XML files by month.
    Downloads: 1 This Week
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  • 23
    This library provides functionality to check a SF.net RSS feed for the latest file. My Wallpaper Changer uses this lib to check for updates.
    Downloads: 1 This Week
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  • 24
    Implements XEP-0009 using xmpp python library
    Downloads: 1 This Week
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  • 25
    Rapidshare shell downloader for Premium Account users. Simply to use, with proxy support
    Downloads: 1 This Week
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