Csharp

The Free Software Media System - Server Backend & API

A modern file manager that helps users organize their files and folders.

ShareX is a free and open-source application that enables users to capture or record any area of their screen with a single keystroke. It also supports uploading images, text, and various file types to a wide range of destinations.

🔥LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer（第 2 版）》、《程序员面试金典（第 6 版）》题解

A Swiss Army knife for developers.

Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI

Windows Calculator: A simple yet powerful calculator that ships with Windows

🛠「Watt Toolkit」是一个开源跨平台的多功能 Steam 工具箱。

Pulumi - Infrastructure as Code in any programming language 🚀

Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics

A collection of awesome .NET libraries, tools, frameworks and software

:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.

PEASS - Privilege Escalation Awesome Scripts SUITE (with colors)

Bitwarden infrastructure/backend (API, database, Docker, etc).

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Free and open-source software that allows users to set animated desktop wallpapers and screensavers powered by WinUI 3.

Clean Architecture Solution Template: A proven Clean Architecture Template for ASP.NET Core 10

Open Source real-time strategy game engine for early Westwood games such as Command & Conquer: Red Alert written in C# using SDL and OpenGL. Runs on Windows, Linux, *BSD and Mac OS X.

This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.

Amplication brings order to the chaos of large-scale software development by creating Golden Paths for developers - streamlined workflows that drive consistency, enable high-quality code practices, simplify onboarding, and accelerate standardized delivery across teams.

Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.

One framework for creating powerful cross-platform games.

Speech-to-text, text-to-speech, speaker diarization, speech enhancement, source separation, and VAD using next-gen Kaldi with onnxruntime without Internet connection. Support embedded systems, Android, iOS, HarmonyOS, Raspberry Pi, RISC-V, RK NPU, Axera NPU, Ascend NPU, x86_64 servers, websocket server/client, support 12 programming languages

A wrapper executable that can run any executable as a Windows service, in a permissive license.

🏞 A fast, open-source, modern image viewer for 90+ formats – including WEBP, GIF, SVG, AVIF, JXL, HEIC and more – built for smooth browsing across Windows, macOS, and Linux.

Generate types and converters from JSON, Schema, and GraphQL

C# application with primary purpose of farming Steam cards from multiple accounts simultaneously.

Lightning-Fast, On-Device, Multilingual TTS — running natively via ONNX.

Video game library manager with support for wide range of 3rd party libraries and game emulation support, providing one unified interface for your games.

The official repo for the design of the C# programming language

Scalable open-source game backend server: multiplayer, matchmaking, leaderboards, chat, and social features for games.

ASP.NET Boilerplate - Web Application Framework

Powerful .NET library for benchmarking

A .NET library that makes it easier to create beautiful console applications.

Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.

A tool for generating code based on a GraphQL schema and GraphQL operations (query/mutation/subscription), with flexible support for custom plugins.

Cross Platform Terminal UI toolkit for .NET

Apache Thrift

Provides an efficient allocation free async/await integration for Unity.

Blazor Component Library based on Material Design principles. Do more with Blazor, utilizing CSS and keeping JavaScript to a bare minimum.

Open-source platform for building cross-platform native Mobile, Web, Desktop, and Embedded apps from a single C#/XAML codebase. Work from any IDE/CLI with Hot Reload, Visual Designer, MCPs, and Skills built for modern .NET workflows. 200M+ NuGet downloads.

Automatically switches between the dark and light theme of Windows 10 and Windows 11

WPF UI provides the Fluent experience in your known and loved WPF framework. Intuitive design, themes, navigation and new immersive controls. All natively and effortlessly.

A polyglot document intelligence framework with a Rust core. Extract text, metadata, images, and structured data from 101 formats (115 file extensions) plus code intelligence for 371 code languages. 15 language bindings — Rust, Python, Ruby, Java, Go, PHP, Elixir, C#, TypeScript — plus CLI, REST API, and MCP server.

An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to abstract mutable state away from your user interfaces, express the idea around a feature in one readable place and improve the testability of your application.

A curated list of Multiplayer Game Network Programming Resources