.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☆58,982Updated this week
- A modern file manager that helps users organize their files and folders.☆46,494Updated this week
- ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.☆38,499Updated this week
- A browser automation framework and ecosystem.☆34,579Updated this week
- Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI☆31,758Updated this week
- 🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。☆27,407Updated this week
- .NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!☆26,954Updated this week
- Pulumi - Infrastructure as Code in any programming language 🚀☆25,841Updated this week
- .NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.☆23,329Updated this week
- .NET news, announcements, release notes, and more!☆22,066Updated this week
- A collection of awesome .NET libraries, tools, frameworks and software☆21,703Mar 26, 2026Updated 7 months ago
- Clean Architecture Solution Template for ASP.NET Core☆20,702Updated this week
- Bitwarden infrastructure/backend (API, database, Docker, etc).☆20,565Updated this week
- Roadmap to becoming an ASP.NET Core developer in 2026☆19,667Jan 29, 2026Updated 9 months ago
- Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10☆18,536Sep 21, 2026Updated last month
- .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.☆18,405Updated 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…☆17,730Oct 28, 2026Updated last 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☆17,461Jan 21, 2023Updated 3 years ago
- A framework for building native Windows apps with React.☆17,372Updated this week
- Free, open-source file converter. Convert 263 formats offline by drag & drop — images, PDF, Word, Excel, PowerPoint, HWP/HWPX, video, aud…☆21,837Updated this week
- Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows…☆16,010Jun 30, 2026Updated 4 months ago
- Speech-to-text, text-to-speech, speaker diarization, speech enhancement, source separation, and VAD using next-gen Kaldi with onnxruntime…☆15,740Updated this week
- 🏞 A fast, open-source, modern image viewer for 90+ formats – including WEBP, GIF, SVG, AVIF, JXL, HEIC and more – built for smooth brows…☆14,816Updated this week
- One framework for creating powerful cross-platform games.☆14,602Updated this week
- A wrapper executable that can run any executable as a Windows service, in a permissive license.☆14,409Jul 30, 2026Updated 3 months ago
- A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET.☆14,531Updated this week
- Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker…☆14,255Updated this week
- Full Modular Monolith application with Domain-Driven Design approach.☆14,114Jun 4, 2024Updated 2 years ago
- C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.☆13,784Updated this week
- Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.☆13,673Updated this week
- CoreCLR is the runtime for .NET Core. It includes the garbage collector, JIT compiler, primitive data types and low-level classes.☆12,755Jan 21, 2023Updated 3 years ago
- ASP.NET Boilerplate - Web Application Framework☆11,999Oct 26, 2026Updated last week
- This is a collection of tutorials for learning how to use Docker with various tools. Contributions welcome.☆11,881Jul 27, 2023Updated 3 years ago
- A .NET library that makes it easier to create beautiful console applications.☆11,690Oct 26, 2026Updated last week
- Powerful .NET library for benchmarking☆11,525Updated this week
- Mono open source ECMA CLI, C# and .NET implementation.☆11,476Aug 27, 2024Updated 2 years ago
- Cross Platform Terminal UI toolkit for .NET☆11,304Updated 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…☆11,117Updated this week
- Cloud Native application framework for .NET☆10,919Updated this week
- Capture Screen, Audio, Cursor, Mouse Clicks and Keystrokes☆10,874May 25, 2026Updated 5 months ago