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.

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  • 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.
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  • 1
    Paket

    Paket

    A dependency manager for .NET with support for NuGet packages and Git

    A dependency manager for .NET with support for NuGet packages and Git repositories. NuGet does not separate out the concept of transitive dependencies. If you install a package into your project and that package has further dependencies then all transitive packages are included in the packages.config. There is no way to tell which packages are only transitive dependencies. Even more importantly: If two packages reference conflicting versions of a package, NuGet will silently take the latest version (read more). You have no control over this process. Paket on the other hand maintains this information on a consistent and stable basis within the paket.lock file in the solution root. This file, together with the paket.dependencies file enables you to determine exactly what's happening with your dependencies.
    Downloads: 3 This Week
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  • 2
    Jasper in an open source, cross-platform web programming framework.
    Downloads: 4 This Week
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  • 3
    A framework that provides AJAX technologies for web pages created with ASP.NET. It allows developers to easily integrate AJAX support into their pages without replacing the ASP.NET controls and/or writing javascript code.
    Downloads: 2 This Week
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  • 4
    ASP.NET 2.0 UI generation for objects and data views. Includes enhanced datagrid, details and sidexside viewer. Flexible layout; desiger tools; auto 2-way databinding; reduces code. Separate download: Data Access using Enterprise Library and Generics.
    Downloads: 1 This Week
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  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

    MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.
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  • 5
    PHPRPC is a Remote Procedure Calling (RPC) protocol that works over the Internet. It is secure and fast. It has a smaller overhead. It is powerful and easy to use. This project is the client and server implementations of the PHPRPC.
    Downloads: 1 This Week
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  • 6
    A script editor (stored as xml) that displays the code in a graphical way. You can code mainly using your mouse. You can also run your script in one click. Easy manipulation of files, IO, mails, loops, directories... 'XS' stands for 'Xml Script'.
    Downloads: 1 This Week
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  • 7
    nToolbox is a .NET library of commonly used code. It provides developers with a set of reusable .Net components that solve common problems and simplifies common tasks.
    Downloads: 1 This Week
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  • 8
    A2D Framework
    1. Cache System(本地缓存与分布式缓存共存、支持Memcache和Redis、支持贴标签形式(类似Spring 3.x的Cache形式)) 2. Event System(本地事件与分布式事件分发) 3. IoC(自动匹配功能,实例数量限制功能) 4. Sql Dispatcher System(基于Sql server的读写分离系统) 5. Session System(分布式Session系统) 6. 分布式Command Bus(MSMQ实现,解决4M限制,支持Session的读取) 7. 规则引擎
    Downloads: 0 This Week
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  • 9

    ASP.NET DaST

    New architectural pattern for building highly dynamic Web 2.0 apps.

    DaST is a new architectural pattern for building highly dynamic Web 2.0 applications. A web page is rendered as a set of randomly nested rectangles where each rectangle is controlled individually and every combination of rectangles can be partially updated via AJAX. DaST is designed to make web development more natural and intuitive, without complexity that other known frameworks have. QUICK OVERVIEW: http://www.makeitsoft.com/dast-overview/ ***************************************** NOTE: This project is moved to www.Makeitsoft.com. Here at SF I'll only keep the latest build for download, but for documentation, forums, support, feedback, etc., please visit the main site. ***************************************** LINKS: Site: http://www.makeitsoft.com Docs: http://www.makeitsoft.com/getting-started/ Forum: http://www.makeitsoft.com/forums/forum/asp-net-dast/ Twitter: follow @rgubarenko for news and updates
    Downloads: 0 This Week
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  • Enterprise and Small Business CRM Solution | Clear C2 C2CRM Icon
    Enterprise and Small Business CRM Solution | Clear C2 C2CRM

    Voted Best CRM System with Top Ranked Customer Support. CRM Management includes Sales, Marketing, Relationship Management, and Help Desk.

    C2CRM consists of four modules that integrate to provide a comprehensive CRM solution: Relationship Management, Sales Automation, Marketing Automation, and Customer Service. Only buy what each user needs.
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  • 10
    Ajaj.Net is an ASP.NET library for develop AJAX web application with JSON. It support C#, Visual Basic.Net and so on. For use it, put the AjajMethod attribute on the method, just like use WebMethod attribute in Web Service.
    Downloads: 0 This Week
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  • 11
    AlexaWidgets is a simple module for Cuyahoga framework. It shows the traffic of your site, monitored by Alexa.com
    Downloads: 0 This Week
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  • 12
    Assembly of classe to help asp.net 2.0 web designer. Developer can inherits from this assembly for building page. Error handling, translation, standard workflow (search, list, detail) must be implemented in framework. Developer just override function
    Downloads: 0 This Week
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  • 13
    Very useful framework library, contains many frequent used code snippets, algorithms, data structures, WinForms & APS.NET controls for all-day work.
    Downloads: 0 This Week
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  • 14
    A smart framework and extensions to create powerfull applications using .NET 2.0 or later (3.0, 3.5, 4.0 etc.) and C#. MS SQL 2000, 2005 and 2008 and soon MySql 5+ can be used as database but it's not required for small apps.
    Downloads: 0 This Week
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  • 15
    CLAM (Common Language Automation Machine) attempts to eliminate the rote mapping of data to objects that is prevalent in most modern development languages by breaking the bonds of relational data and providing a generic mechanism for retrieving data.
    Downloads: 0 This Week
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  • 16
    A core framework based on .net technology to provide extended functionalities upon the standard .net framework. - Generic ORM engine (based on Emit) - High performance Cache impl - Lite Reflection.Emit framework - Collection Framework (proposed)
    Downloads: 0 This Week
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  • 17
    Set of .NET libraries, UI controls & applications for managing & synchronizing contact information. It includes managed wrappers for file formats like vCard, and classes to manage/sync contact information with popular applications & online services.
    Downloads: 0 This Week
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  • 18
    Domain Architect is a tool for 3-tier enterprise application code generation, a framework, and a set of practices provided as building blocks. (Related words: database script, O/R mapper, business object code generator, poco, enterprise applications)
    Downloads: 0 This Week
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  • 19
    XsltDb is a browser-based application development environment for DotNetNuke. It offers smooth coding (syntax highlighting, code completion, context help), database access (SQL, portal data isolation, dedicated portal database), AJAX, XSLT.
    Downloads: 0 This Week
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  • 20
    Extensible repository and context-per-request infrastrucuture for .NET projects using Entity Framework.
    Downloads: 0 This Week
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  • 21
    EL4NET, the extension library for the .NET framework, provides an open and extensible component model, a flexible configuration system, and a mechanism that allows distributed applications to be deployed without changes on multiple physical architectures.
    Downloads: 0 This Week
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  • 22
    Localization, localizable e-mail, developer-specific configurations, URL rewriting, Windows services, UAC, payment gateways, etc. This project actually uses the Code Project Open License (CPOL). Please see downloaded files for details.
    Downloads: 0 This Week
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  • 23

    Evolution.Net

    Evolution.Net Enterprise Application Framework. Develop quick apps.

    Evolution.Net is a complete framework for projects using DotNet. It aims to define a standard architecture for DotNet projects, based on the MVP (Model-View-Presenter) pattern, integrating components and other libraries and automating common tasks. Now moved to BitBucket: https://bitbucket.org/leopuglia/evolution.net
    Downloads: 0 This Week
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  • 24
    FLUX.NET is a next generation content management system and web application framework for creating dynamic high impact websites with enterprise class management features and exceptional extensibility.
    Downloads: 0 This Week
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  • 25
    FileHelpers Library
    http://www.filehelpers.net The FileHelpers are an easy to use .NET library written in C#. Is designed to read/write data from flat files with fixed length or delimited records (CSV). Also has support to import/export data from different data storages (Excel, Access, SqlServer) Code on GitHub: https://github.com/MarcosMeli/FileHelpers
    Downloads: 0 This Week
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