.NET is a versatile and powerful open-source developer platform created by Microsoft that supports building applications for various environments, including web, mobile, desktop, gaming, and IoT. Its core framework facilitates the development of applications using languages like C#, F#, and Visual Basic, offering robust libraries and runtime components that enhance productivity and performance. Application developers benefit from .NET’s ability to streamline cross-platform development with its unification of platforms through .NET Core, ensuring that their applications can run seamlessly on major operating systems such as Windows, macOS, and Linux. Additionally, tools like Visual Studio and Visual Studio Code optimize the development workflow with advanced debugging, testing, and deployment capabilities. .NET’s strong community support, continuous updates, and integration with cloud services make it a reliable choice for developers aiming to build secure, scalable, and efficient applications.
View the most prominent open source .NET projects in the list below. Click on a specific project to view its alternative or complementary packages. Make comparisons and find the best package for your app.
- The Free Software Media System - Server Backend & API☆48,600Updated this week
- A modern file manager that helps users organize their files and folders.☆41,877Feb 13, 2026Updated last week
- ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.☆37,712Updated this week
- A browser automation framework and ecosystem.☆34,004Updated this week
- Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology☆30,065Updated this week
- Pulumi - Infrastructure as Code in any programming language 🚀☆24,708Updated this week
- .NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!☆24,612Updated this week
- 🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。☆24,473Feb 13, 2026Updated last week
- .NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.☆23,181Updated this week
- .NET news, announcements, release notes, and more!☆21,892Updated this week
- A collection of awesome .NET libraries, tools, frameworks and software☆21,110Sep 16, 2025Updated 5 months ago
- Roadmap to becoming an ASP.NET Core developer in 2026☆19,534Jan 29, 2026Updated 3 weeks ago
- Bitwarden infrastructure/backend (API, database, Docker, etc).☆18,043Feb 13, 2026Updated last week
- Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10☆17,994Jan 7, 2026Updated last month
- This repo is used for servicing PR's for .NET Core 2.1 and 3.1. Please visit us at https://github.com/dotnet/runtime☆17,534Jan 21, 2023Updated 3 years ago
- .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.☆17,630Updated this week
- A framework for building native Windows apps with React.☆17,190Updated this week
- Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and Open…☆16,437Updated this week
- Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows…☆16,007Feb 13, 2026Updated last week
- Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker…☆14,128Feb 13, 2026Updated last week
- A wrapper executable that can run any executable as a Windows service, in a permissive license.☆13,696Feb 9, 2026Updated last week
- Full Modular Monolith application with Domain-Driven Design approach.☆13,356Jun 4, 2024Updated last year
- One framework for creating powerful cross-platform games.☆13,175Updated this week
- C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.☆13,065Updated this week
- CoreCLR is the runtime for .NET Core. It includes the garbage collector, JIT compiler, primitive data types and low-level classes.☆12,779Jan 21, 2023Updated 3 years ago
- 🏞 A lightweight, versatile image viewer☆12,230Feb 9, 2026Updated last week
- This is a collection of tutorials for learning how to use Docker with various tools. Contributions welcome.☆12,141Jul 27, 2023Updated 2 years ago
- ASP.NET Boilerplate - Web Application Framework☆11,997Jan 27, 2026Updated 3 weeks ago
- Mono open source ECMA CLI, C# and .NET implementation.☆11,424Aug 27, 2024Updated last year
- Powerful .NET library for benchmarking☆11,359Updated this week
- A .NET library that makes it easier to create beautiful console applications.☆11,176Feb 12, 2026Updated last week
- Cloud Native application framework for .NET☆10,716Updated this week
- Cross Platform Terminal UI toolkit for .NET☆10,748Updated this week
- Capture Screen, Audio, Cursor, Mouse Clicks and Keystrokes☆10,570Apr 9, 2023Updated 2 years ago
- Welcome to the AWS Code Examples Repository. This repo contains code examples used in the AWS documentation, AWS SDK Developer Guides, a…☆10,359Feb 11, 2026Updated last week
- Speech-to-text, text-to-speech, speaker diarization, speech enhancement, source separation, and VAD using next-gen Kaldi with onnxruntime…☆10,344Updated this week
- 🌈【C#/.NET/.NET Core学习、工作、面试指南】记录、收集和总结C#/.NET/.NET Core基础知识、学习路线、开发实战、编程技巧练习、学习视频、文章、书籍、项目框架、社区组织、开发必备工具、技术前沿周刊、常见面试题、面试须知、简历模板、人才招聘、以及自…☆10,069Feb 10, 2026Updated last week
- An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required☆10,012Updated this week
- ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.☆9,976Feb 13, 2026Updated last week
- Open-source platform for building cross-platform native Mobile, Web, Desktop and Embedded apps quickly. Create rich, C#/XAML, single-cod…☆9,816Feb 12, 2026Updated last week