.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☆48,779Updated this week
- A modern file manager that helps users organize their files and folders.☆42,027Feb 20, 2026Updated last week
- ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.☆37,738Updated this week
- A browser automation framework and ecosystem.☆34,050Updated this week
- Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology☆30,099Updated this week
- Pulumi - Infrastructure as Code in any programming language 🚀☆24,818Updated this week
- .NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!☆24,637Updated this week
- 🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。☆24,509Feb 13, 2026Updated 2 weeks ago
- .NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.☆23,184Updated this week
- .NET news, announcements, release notes, and more!☆21,902Updated this week
- A collection of awesome .NET libraries, tools, frameworks and software☆21,126Sep 16, 2025Updated 5 months ago
- Roadmap to becoming an ASP.NET Core developer in 2026☆19,541Jan 29, 2026Updated 3 weeks ago
- Bitwarden infrastructure/backend (API, database, Docker, etc).☆18,085Updated this week
- Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10☆18,020Updated this week
- 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.☆17,702Updated this week
- A framework for building native Windows apps with React.☆17,196Updated 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…☆16,461Updated this week
- Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows…☆16,006Feb 15, 2026Updated last week
- Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker…☆14,136Feb 19, 2026Updated last week
- A wrapper executable that can run any executable as a Windows service, in a permissive license.☆13,705Feb 9, 2026Updated 2 weeks ago
- Full Modular Monolith application with Domain-Driven Design approach.☆13,413Jun 4, 2024Updated last year
- One framework for creating powerful cross-platform games.☆13,195Updated this week
- C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.☆13,089Updated this week
- CoreCLR is the runtime for .NET Core. It includes the garbage collector, JIT compiler, primitive data types and low-level classes.☆12,777Jan 21, 2023Updated 3 years ago
- 🏞 A lightweight, versatile image viewer☆12,269Feb 19, 2026Updated last week
- This is a collection of tutorials for learning how to use Docker with various tools. Contributions welcome.☆12,147Jul 27, 2023Updated 2 years ago
- ASP.NET Boilerplate - Web Application Framework☆12,000Jan 27, 2026Updated last month
- Mono open source ECMA CLI, C# and .NET implementation.☆11,425Aug 27, 2024Updated last year
- Powerful .NET library for benchmarking☆11,365Updated this week
- A .NET library that makes it easier to create beautiful console applications.☆11,234Updated this week
- Cloud Native application framework for .NET☆10,718Updated this week
- Cross Platform Terminal UI toolkit for .NET☆10,768Feb 17, 2026Updated last week
- Capture Screen, Audio, Cursor, Mouse Clicks and Keystrokes☆10,572Apr 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…☆10,367Updated this week
- Speech-to-text, text-to-speech, speaker diarization, speech enhancement, source separation, and VAD using next-gen Kaldi with onnxruntime…☆10,429Updated 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…☆10,088Feb 10, 2026Updated 2 weeks ago
- An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required☆10,022Feb 16, 2026Updated last week
- ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.☆9,995Updated this week
- Open-source platform for building cross-platform native Mobile, Web, Desktop and Embedded apps quickly. Create rich, C#/XAML, single-cod…☆9,838Updated this week