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.

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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: 3,485 This Week
    Last Update:
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  • 2
    a POSIX-C implementation of the http://oauth.net/ protocol. libOauth provides functionality to encode URLs and sign HTTP request data according to the oAuth standard.
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    Downloads: 3,555 This Week
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  • 3
    PDF.js

    PDF.js

    A PDF Reader in JavaScript

    PDF.js is a web standards-based platform for parsing and rendering Portable Document Formats (PDFs). Open source and built with HTML5, this PDF viewer is supported by a great community and Mozilla Labs. PDF.js can be used on both modern and older browsers, and is built into version 19+ of Firefox.
    Downloads: 65 This Week
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  • 4
    PreMiD

    PreMiD

    Source code of the PreMiD application

    Source code of the PreMiD application. PreMiD is a simple, configurable utility that allows you to show what you're doing on the web in your Discord now playing status. It supports many different websites, and will support multiple users watching the same content simultaneously in an upcoming update.
    Downloads: 49 This Week
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    Go from Code to Production URL in Seconds

    Cloud Run deploys apps in any language instantly. Scales to zero. Pay only when code runs.

    Skip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
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  • 5
    OpenResty

    OpenResty

    High Performance Web Platform Based on Nginx and LuaJIT

    OpenResty is a full-fledged web application server that extends Nginx by seamlessly embedding LuaJIT, bundled Nginx core, numerous third-party modules, and Lua libraries—creating a powerful platform for scalable web services, APIs, and gateways. An extensive ecosystem of Lua libraries and third-party Nginx modules that interoperate cohesively. Supports scripting of SSL, process control, regex, pipes, and logging via Lua APIs. Well-supported documentation, Docker tooling, and commercial support options.
    Downloads: 24 This Week
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  • 6
    phpipam

    phpipam

    phpipam open-source IP address management

    phpipam is an open-source web IP address management application (IPAM). Its goal is to provide light, modern and useful IP address management. It is php-based application with MySQL database backend, using jQuery libraries, ajax and some HTML5/CSS3 features.
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    Downloads: 110 This Week
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  • 7
    Docker Compose

    Docker Compose

    Define and run multi-container applications with Docker

    Docker Compose is an open source tool for defining and running multi-container applications with Docker. Compose lets you use a YAML file to configure your application’s services, and then create and start all the services from your configuration with just a single command. Compose works great in all environments: production, staging, testing, development, and on CI workflows. Compose has commands for every stage of your application lifecycle, from starting, stopping and rebuilding services, through to status viewing, streaming of log output and running a one-off command on a service.
    Downloads: 21 This Week
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  • 8
    Glean

    Glean

    A self-hosted RSS reader and personal knowledge management tool

    Glean is a self-hosted RSS reader and personal knowledge management platform designed to help information-heavy users efficiently aggregate, browse, and organize content from feeds. It centralizes RSS/Atom subscriptions, offering clean reading views, tagging, and organization features such as folders and bookmarks, while giving users full control over their data by deploying on their own infrastructure. Glean also includes real-time background synchronization, enabling feeds to update at regular intervals without manual refresh, and it supports importing and exporting subscription lists for portability. With a modern responsive UI and optional admin dashboard, Glean balances readability with lightweight performance, making it suited for both individual readers and teams. Its knowledge management capabilities are augmented by features like smart filtering, “read later” queues, and future plans for AI-driven summaries and preference-based recommendations.
    Downloads: 19 This Week
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  • 9
    Sentinel

    Sentinel

    Lightweight, powerful flow control component

    Sentinel is a powerful flow control component that ensures the reliability and monitoring of microservices by taking “flow” as the breakthrough point. It covers multiple fields including flow control, concurrency limiting, circuit breaking, and adaptive system protection.
    Downloads: 17 This Week
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    Gemini 3 and 200+ AI Models on One Platform

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  • 10
    Static Web Server

    Static Web Server

    A cross-platform, high-performance and asynchronous web server

    Static Web Server (or SWS abbreviated) is a tiny and fast production-ready web server suitable to serve static web files or assets. It is focused on lightness and easy-to-use principles while keeping high performance and safety powered by The Rust Programming Language. Written on top of Hyper and Tokio runtime, it provides concurrent and asynchronous networking abilities and the latest HTTP/1 - HTTP/2 implementations. Cross-platform and available for Linux, macOS, Windows, FreeBSD, NetBSD, Android, Docker and Wasm (via Wasmer).
    Downloads: 12 This Week
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  • 11
    Mongoose Embedded Web Server

    Mongoose Embedded Web Server

    An embedded web server

    Mongoose is a networking library for C/C++. It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT. It is designed for connecting devices and bringing them online. On the market since 2004, used by vast number of open source and commercial products - it even runs on the International Space Station! Mongoose makes embedded network programming fast, robust, and easy. Cross-platform, works on Linux/UNIX, MacOS, Windows, Android, FreeRTOS, etc. Supported embedded architectures: ESP32, NRF52, STM32, NXP, and more. Built-in protocols: plain TCP/UDP, HTTP, MQTT, Websocket. SSL/TLS support: mbedTLS, OpenSSL or custom (via API). Used to solve a wide range of business needs, like implementing Web UI interface on devices, RESTful API services, telemetry data exchange, remote control for a product, remote software updates, remote monitoring, and others.
    Downloads: 11 This Week
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  • 12
    Lighthouse

    Lighthouse

    Automated auditing, performance metrics, & best practices for the web

    Lighthouse is an open-source, automated tool that analyzes and audits web apps and web pages in order to improve their quality. Lighthouse collects modern performance metrics and insights on developer best practices; auditing for performance, accessibility, SEO and more. After auditing it produces a report either in JSON or HTML. Included in the report is a reference doc that explains the importance of the audit and how to fix the problem areas, which you can use to improve the web app or web page. Lighthouse can be integrated directly into the Chrome DevTools with its own panel. To run it, you would simply have to select the Lighthouse panel and click on "Generate report". It can also be run from the command line, or as a Node module.
    Downloads: 10 This Week
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  • 13
    Java JWT

    Java JWT

    Java implementation of JSON Web Token (JWT)

    A Java implementation of JSON Web Token (JWT) - RFC 7519. This library requires Java 8 or higher. The last version that supported Java 7 was 3.11.0. The library implements JWT Verification and Signing using several algorithms. The Algorithm defines how a token is signed and verified. It can be instantiated with the raw value of the secret in the case of HMAC algorithms, or the key pairs or KeyProvider in the case of RSA and ECDSA algorithms. Once created, the instance is reusable for token signing and verification operations. When using RSA or ECDSA algorithms and you just need to sign JWTs you can avoid specifying a Public Key by passing a null value. The same can be done with the Private Key when you just need to verify JWTs.
    Downloads: 8 This Week
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  • 14
    Omnom

    Omnom

    A web content preservation service

    Omnom is a self-hosted content preservation and web bookmarking platform that lets individuals and communities save and archive web content in a way that reflects exactly what they saw in their browser at the moment of capture. Unlike simple bookmark lists, Omnom makes full page snapshots — including dynamic content — so that saved pages remain viewable even if the original goes offline or changes later. It was built with a multi-user web interface and includes support for federated social protocols like ActivityPub, allowing integration with decentralized networks and community tools. The application lets users categorize, tag, and search saved content, aggregate RSS/Atom feeds, and review changes between captured snapshots with diff views. A browser extension for Chrome and Firefox makes it easy to add new bookmarks and initiate snapshots directly from your browsing session.
    Downloads: 8 This Week
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  • 15
    Laravel Cookie Consent

    Laravel Cookie Consent

    Make your Laravel app comply with the crazy EU cookie law

    All sites owned by EU citizens or targeted towards EU citizens must comply to a crazy EU law. This law requires a dialog to be displayed to inform the users of your websites how cookies are being used. You can read more info on the legislation on the site of the European Commission. The newest Laravel package made by my colleagues at Spatie and myself makes your app compliant with that law. When the user clicks "Allow cookies" a laravel_cookie_consent cookie will be set and the dialog will be removed from the DOM. On the next request Laravel will notice that the laravel_cookie_consent has been set and will not display the dialog again. The legislation is pretty very vague on how to display the warning, which texts are necessary, and what options you need to provide. This package will go a long way towards compliance, but if you want to be 100% sure that your website is ok, you should consult a legal expert.
    Downloads: 7 This Week
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  • 16
    WorkerVless2sub

    WorkerVless2sub

    Automate batch replacement to generate subscription generators

    WorkerVless2sub is a dedicated subscription generator focused on providing “preferred line” subscriptions by processing VMess, VLESS, Trojan nodes, filtering and replacing automatically via a Cloudflare Worker script. The idea is you supply node lists (or use existing APIs/CSV sources) and the worker filters them by criteria like speed or reliability and then emits a subscription link for end-users. It supports deployment on Cloudflare Pages or Workers, offers configuration via variables like HOST, UUID, PATH, ADD, ADDAPI etc., and has an Apache-2.0 license. The tool supports both IPv4 and IPv6 node sources, speed test CSV inputs, and logic to drop nodes that don’t meet the threshold (DLS variable). It has a sizeable star count and forks indicating broader adoption in self-hosted proxy subscription communities. The README also explicitly warns about hosting personal private nodes in the script if intending public use.
    Downloads: 7 This Week
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  • 17
    Zuul

    Zuul

    Gateway service providing dynamic routing, monitoring and more

    Zuul is an L7 application gateway that offers many capabilities, including dynamic routing, monitoring, security, resiliency and more. It is used in the backend of the Netflix streaming service as a front door for all requests from devices and web sites. Zuul is ideal for cases like this where API traffic volume and diversity can become overwhelming and cause production issues to arise suddenly and without warning. Zuul has a broad range of filters that enable it to perform multiple functions quickly and apply functionality to services like Netflix. These functions include security authentication, dynamic routing, stress testing, load shedding and more.
    Downloads: 7 This Week
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  • 18
    Apache Guacamole

    Apache Guacamole

    HTML5 Clientless Remote Desktop

    Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH. We call it clientless because no plugins or client software are required. Thanks to HTML5, once Guacamole is installed on a server, all you need to access your desktops is a web browser.
    Downloads: 27 This Week
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  • 19
    Amazon DynamoDB Session Store

    Amazon DynamoDB Session Store

    Handles sessions for Ruby web applications using DynamoDB as a backend

    The Amazon DynamoDB Session Store handles sessions for Ruby web applications using a DynamoDB backend. The session store is compatible with all Rack-based frameworks. For Rails applications, use the aws-sdk-rails gem. The session store is a Rack Middleware, meaning that it will implement the Rack interface for dealing with HTTP request/responses. This session store uses a DynamoDB backend in order to provide scaling and centralized data benefits for session storage with more ease than other containers, like local servers or cookies. Once an application scales beyond a single web server, session data will need to be shared across the servers. DynamoDB takes care of this burden for you by scaling with your application. Cookie storage places all session data on the client side, discouraging sensitive data storage. It also forces strict data size limitations. DynamoDB takes care of these concerns by allowing for a safe and scalable storage container with a much larger data size limit.
    Downloads: 6 This Week
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  • 20
    Express Rate Limit

    Express Rate Limit

    Basic rate-limiting middleware for the Express web server

    Express Rate Limit is a middleware for Express applications that helps prevent abuse by limiting repeated requests to public APIs and endpoints.
    Downloads: 6 This Week
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  • 21
    Koa-OAI-Router

    Koa-OAI-Router

    Koa Router, based on OpenAPI, Swagger and Json Schema

    I have used Markdown and wiki to manage API doc, from which I have suffered a lot. It wastes too much time and is very boring. The document should be repaired when you change the API. It's very inconvenient to test and debug. The management of API doc totally depends on people. As a result, it is hard to make documents have high quality. Meanwhile, the developers will spend more time on testing, which may have a bad effect on the project.
    Downloads: 6 This Week
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  • 22
    LANraragi

    LANraragi

    Web application for archival and reading of manga/doujinshi

    LANraragi is a web application for archiving and reading manga/doujinshi. Lightweight and Docker-ready, it's designed for NAS and server environments, providing a user-friendly interface for managing comic collections.​
    Downloads: 6 This Week
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  • 23
    Plausible Analytics

    Plausible Analytics

    Simple, open-source, lightweight and privacy-friendly web analytics

    Plausible is lightweight and open-source web analytics. No cookies and fully compliant with GDPR, CCPA and PECR. Made and hosted in the EU, powered by European-owned cloud infrastructure. Frustrated with Google Analytics? So are we and that's why we built Plausible Analytics, a simple, lightweight (< 1 KB), open source, and privacy-friendly alternative that doesn't come from the adtech world. Web analytics went from a simple, fun and useful practice for site owners to a data-grabbing machine for surveillance capitalism. Google Analytics is frustrating to use, difficult to understand, slow to load and privacy-invasive too. Plausible Analytics is built for privacy-conscious site owners. You get valuable and actionable stats to help you improve your efforts while your visitors keep having a nice and enjoyable experience. Plausible is simple analytics. It is easy to understand and it cuts through the noise.
    Downloads: 6 This Week
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  • 24
    Web Archives

    Web Archives

    Browser extension for viewing archived and cached versions of websites

    Browser extension for viewing archived and cached versions of web pages, available for Chrome, Edge and Safari. Web Archives is a browser extension that enables you to find archived and cached versions of web pages, and comes with support for more than 10 search engines. Searches can be initiated from the context menu and the browser toolbar. A diverse set of archive and cache sources are supported, which can be toggled and reordered from the extension's options. Visit the wiki for the full list of supported search engines. You may choose to allow the extension to run on every website, or grant access to the current website before a search. When you grant access only to the current website, access must also be granted to each search engine in order to view search results. A handful of search modes are offered that serve different use cases. The search mode can be set independently for the context menu and the browser toolbar from the extension's options.
    Downloads: 6 This Week
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  • 25
    lambda-request-handler

    lambda-request-handler

    Package your Node.js web app as a Lambda function executed by an API

    Package your Node.js web app as a Lambda function executed by an API Gateway or ALB event. An npm module that allows your Node.js web applications to be deployed as an AWS Lambda function and invoked in response to API Gateway, HTTP API, or Application Load Balancer requests.
    Downloads: 6 This Week
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