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

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

    MongoDB Atlas provides built-in vector search and a flexible document model so developers can build, scale, and run gen AI apps without stitching together multiple databases. From LLM integration to semantic search, Atlas simplifies your AI architecture—and it’s free to get started.
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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
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  • 1
    JPPF

    JPPF

    The open source grid computing solution

    JPPF makes it easy to parallelize computationally intensive tasks and execute them on a Grid.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 2
    A software toolkit for using the EPCglobal Low Level Reader Protocol (LLRP) to communicate with conforming RFID readers.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 3
    The Cell framework is a scalable server framework written in C#. It's original purpose is for MMOG emulation but can be easily adapted to other areas. The project includes a proof of concept rewrite of the DAoC emulator DOL.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    DiagApplications is an application and libraries to implement communications and data exchange between several .net application on the same computer or the same network.
    Downloads: 0 This Week
    Last Update:
    See Project
  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
    Learn More
  • 5
    DotNetOpenServer SDK

    DotNetOpenServer SDK

    Lightweight fully extendable client/server application framework

    DotNetOpenServer SDK is an open source lightweight fully extendable TCP socket client/server application framework enabling developers to create highly efficient, fast, secure and robust cloud based smart mobile device and desktop applications. Why? Unlike most application server frameworks, which are implemented over slow inefficient stateless protocols such as HTTP, REST and SOAP that use bulky ASCII data formats such as JSON and XML, DotNetOpenServer has been built from the ground up with highly efficient stateful binary protocols.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    Etch is a cross-platform, language- and transport-independent framework for building and consuming network services. With Etch, service development and consumption becomes no more difficult than library development and consumption.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Intel® Mobile Platform SDK 1.3 covered by BSD license, enables developers to build mobile-aware applications. It provides a set of libraries and runtime components, and programming interface, common across Windows and Linux platforms.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    LinkSmart Middleware

    LinkSmart Middleware

    We have moved to https://linksmart.eu - visit us over there!

    You can now find us at https://linksmart.eu -- along with files for download, repositories for code, forums for support, and wikis for documentation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    A simple framework to help quickly put together a TCP/IP server application using C# and .NET 2.0.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Connect every part of your business to one bank account Icon
    Connect every part of your business to one bank account

    North One is a business banking app that integrates cash flow, payments, and budgeting to turn your North One Account into one Connected Bank Account

    North One is proudly built for small businesses, startups and freelancers across America. Make payments easily, keep tabs on your money and put your finances on autopilot through smart integrations with the tools you’re already using. North One was built to make managing money easy so you can focus on running your business. No more branches. No more lines. No more paperwork. Get complete access to your North One Account from your phone or computer, wherever your business takes you. Create Envelopes for taxes, payroll, rent, and anything else automatically.
    Get started for free.
  • 10
    Application monitoring Framework and Command Center administration console to change application settings like alert scheme, monitoring timings, etc., Uses SOAP/XML webservice to communicate between Command Center and the monitored applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Servers Development Kit (SrvDK) is an open source library, written in C#, for quick creation of effective and robust multi-client TCP servers. NOTE: This is work in progress, so far the application is NOT yet usable!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    yagdt (Yet Another Graph Drawing Tool) is a plugin-based graph drawing application & distributed graph storage engine.
    Downloads: 0 This Week
    Last Update:
    See Project
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