118 open source projects written in C#

01 Jellyfin ★ 59K

Self-hosted media server for movies, music, and more

02 Files ★ 46K

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

03 ShareX ★ 41K

Powerful screen capture and file sharing tool for Windows

04 DevToys ★ 32K

A Swiss Army knife for developers.

05 Avalonia ★ 32K

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

06 Bitwarden ★ 21K

Secure password management for individuals and businesses

07 OpenRA ★ 18K

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, Li

08 efcore ★ 15K

EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.

09 MonoGame ★ 15K

Free, open-source framework for cross-platform game development

10 DnsServer ★ 10K

Technitium DNS Server

11 LiteDB ★ 9.5K

LiteDB - A .NET NoSQL Document Store in a single data file

12 LibreHardwareMonitor ★ 9.3K

Libre Hardware Monitor is free software that can monitor the temperature sensors, fan speeds, voltages, load and clock speeds of your computer.

13 WeiXinMPSDK ★ 8.9K

微信全平台 .NET SDK， Senparc.Weixin for C#，支持 .NET Framework 及 .NET Core、.NET 10.0。已支持微信公众号、小程序、小游戏、微信支付、企业微信/企业号、开放平台、JSSDK、微信周边等全平台。 WeChat SDK for C#.

14 Ocelot ★ 8.7K

.NET API Gateway

15 OrchardCore ★ 8.2K

Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of tha

16 stride ★ 7.9K

Stride (formerly Xenko), a free and open-source cross-platform C# game engine.

17 NSwag ★ 7.4K

The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript.

18 ScottPlot ★ 6.8K

Interactive plotting library for .NET

19 FASTER ★ 6.6K

Fast persistent recoverable log and key-value store + cache, in C# and C++.

20 NLog ★ 6.5K

NLog - Flexible and Structured Logging for various .NET Platforms

21 s&box ★ 6.5K

Build and play games inside a game engine that runs live

22 keepass2android ★ 6.4K

Password manager app for Android

23 StackExchange.Redis ★ 6.2K

The Redis client for .NET

24 workflow-core ★ 5.9K

Lightweight workflow engine for .NET Standard

25 SqlSugar ★ 5.8K

.Net aot ORM SqlServer ORM Mongodb ORM MySql 瀚高 Postgresql ORM DB2 Hana 高斯 Duckdb C# VB.NET Sqlite ORM Oracle ORM Mysql Orm 虚谷数据库 达梦 ORM 人大金仓 ORM 神通ORM C#

26 RyTuneX ★ 5.6K

RyTuneX is a cutting-edge optimizer built with the WinUI 3 framework, designed to amplify the performance of Windows devices. Crafted for both Windows 10 and 11

27 CefFlashBrowser ★ 5.5K

Flash浏览器 / Flash Browser

28 Blog.Core ★ 5.3K

💖 ASP.NET Core 8.0 全家桶教程，前后端分离后端接口，vue教程姊妹篇，官方文档：

29 Umbraco-CMS ★ 5.3K

Umbraco is a free and open source .NET content management system helping you deliver delightful digital experiences.

30 SparkleShare ★ 5.0K

Share and collaborate by syncing with any Git repository instantly. Linux, macOS, and Windows

31 Harden-Windows-Security ★ 4.8K

Harden Windows Safely, Securely using Official Supported Microsoft methods and proper explanation | Always up-to-date and works with the latest build of Windows

32 docfx ★ 4.4K

Static site generator for .NET API documentation.

33 SimplCommerce ★ 4.4K

A simple, cross platform, modulith ecommerce system built on .NET

34 FreeSql ★ 4.4K

.NET aot orm, VB.NET/C# orm, Mysql/PostgreSQL/SqlServer/Oracle orm, Sqlite/Firebird/Clickhouse/DuckDB orm, 达梦/金仓/虚谷/翰高/高斯 orm, 神通 orm, 南大通用 orm, 国产 orm, TDengin

35 redis-windows ★ 4.4K

Redis 6.0.20 6.2.18 7.0.15 7.2.8 7.4.3 8.0.0 for Windows

36 radzen-blazor ★ 4.4K

Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 145+ native components including DataGrid, Scheduler, Charts, and advanc

37 KillerPDF ★ 4.3K

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fil

38 cake ★ 4.2K

:cake: Cake (C# Make) is a cross platform build automation system.

39 DotnetSpider ★ 4.1K

DotnetSpider, a .NET standard web crawling library. It is lightweight, efficient and fast high-level web crawling & scraping framework

40 puppeteer-sharp ★ 3.9K

Headless Chrome .NET API

41 kiota ★ 3.8K

OpenAPI based HTTP Client code generator

42 LLamaSharp ★ 3.8K

A C#/.NET library to run LLM (🦙LLaMA/LLaVA) on your local device efficiently.

43 XCharts ★ 3.8K

A charting and data visualization library for Unity. Unity数据可视化图表插件。

44 opentelemetry-dotnet ★ 3.8K

The OpenTelemetry .NET Client

45 nuke ★ 3.8K

🏗 The AKEless Build System for C#/.NET

46 Telegram.Bot ★ 3.6K

.NET Client for Telegram Bot API

47 cairoshell ★ 3.4K

Cairo is a customizable, intuitive desktop environment for Windows.

48 murder ★ 3.4K

Murder is a pixel art ECS game engine.

49 run-aspnetcore-microservices ★ 3.3K

Microservices on .NET platforms used ASP.NET Web API, Docker, RabbitMQ, MassTransit, Grpc, Yarp API Gateway, PostgreSQL, Redis, SQLite, SqlServer, Marten, Entit

50 surging ★ 3.3K

Surging is a micro-service engine that provides a lightweight, high-performance, modular RPC request pipeline. support Event-based Asynchronous Pattern and rea

51 CommunityServer ★ 3.2K

Free open source office suite with business productivity tools: document and project management, CRM, mail aggregator.

52 BotSharp ★ 3.1K

AI Multi-Agent Framework in .NET

53 FastReport ★ 3.1K

Free Open Source Reporting tool for .NET6/.NET Core/.NET Framework that helps your application generate document-like reports

54 ZKEACMS ★ 2.8K

ZKEACMS build with .Net 8 (.Net CMS)可视化设计在线编辑内容管理系统

55 FluentScheduler ★ 2.8K

Automated job scheduler with fluent interface for the .NET platform.

56 Audit.NET ★ 2.7K

An extensible framework to audit executing operations in .NET

57 squidex ★ 2.5K

Headless CMS and Content Managment Hub

58 Exceptionless ★ 2.5K

Exceptionless application

59 LitMotion ★ 2.4K

Lightning-fast and Zero Allocation Tween Library for Unity.

60 abot ★ 2.3K

Cross Platform C# web crawler framework built for speed and flexibility. Please star this project! +1.

61 NetPad ★ 2.3K

A cross-platform C# editor and playground.

62 oqtane.framework ★ 2.3K

Oqtane is an open-source developer productivity platform for building modern .NET applications and websites that run on Web, Desktop and Mobile.

63 piranha.core ★ 2.2K

Piranha CMS is the friendly editor-focused CMS for .NET that can be used both as an integrated CMS or as a headless API.

64 WebApiClient ★ 2.1K

A REST API library with better functionality, performance, and scalability than refit

65 Foundatio ★ 2.1K

Pluggable foundation blocks for building distributed apps.

66 titanium-web-proxy ★ 2.0K

A cross-platform high performing HTTP(S) proxy server in C#.

67 DSInternals ★ 2.0K

Directory Services Internals (DSInternals) PowerShell Module and Framework

68 FeatBit ★ 2.0K

Open-source feature flag management for seamless deployments

69 WPFDevelopers ★ 1.9K

🎉 Welcome to follow the official account of "WPFDevelopers"! It covers the basic controls and custom control library (screenshot controls) of WPF. This projec

70 paylinks ★ 1.9K

一套基于 现代 .NET 开发，支持跨平台、多商户的第三方支付SDK。

71 Aptabase ★ 1.9K

Privacy-first analytics for mobile and desktop apps

72 Smartstore ★ 1.7K

A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 10

73 FastTunnel ★ 1.7K

expose a local server to the internet. 高性能跨平台的内网穿透解决方案 远程内网计算机 域名访问内网站点 反向代理内网服务 端口转发 http代理

74 WireMock.Net ★ 1.7K

WireMock.Net is a flexible product for stubbing and mocking web HTTP responses using advanced request matching and response templating. Based on WireMock Java,

75 Seal-Report ★ 1.6K

Database Reporting Tool and Tasks (.Net)

76 OpenAPI.NET ★ 1.6K

The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents fr

77 fido2-net-lib ★ 1.5K

Passkeys, FIDO2 and WebAuthn .NET library.

78 grandnode2 ★ 1.3K

E-commerce platform built with ASP.NET Core using MongoDB for NoSQL storage

79 Blogifier ★ 1.3K

Blogifier is an open-source publishing platform Written in ASP.NET and Blazor WebAssembly. With Blogifier make a personal blog or a website.

80 drasi-platform ★ 1.3K

The Data Change Processing platform

81 beutl ★ 1.2K

Cross-platform video editing (compositing) software.

82 magic ★ 1.2K

Instant SECURE Full Stack Apps and AI Agents

83 aspire-samples ★ 1.2K

Browse the sample apps demonstrating Aspire integration across C#, JavaScript, TypeScript, Python, Go, containers, databases, cloud, AI, and observability scena

84 Dumpify ★ 1.2K

Adding `.Dump()` extension methods to Console Applications, similar to LinqPad's.

85 Dnn.Platform ★ 1.1K

DNN (formerly DotNetNuke) is the leading open source web content management platform (CMS) in the Microsoft ecosystem.

86 power-bi-agentic-development ★ 1.1K

Power BI AI skills and Power BI agents for Claude Code and GitHub Copilot: a plugin marketplace of Power BI skills, subagents, and hooks for semantic models, DA

87 OpenBudgeteer ★ 974

OpenBudgeteer is a budgeting app based on the Bucket Budgeting Principle

88 module-shop ★ 959

一个基于 .NET 8.0 构建的简单、跨平台、模块化的商城系统

89 FlubuCore ★ 937

A cross platform build and deployment automation system for building projects and executing deployment scripts using C# code.

90 logging-log4net ★ 936

Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET

91 Slickflow ★ 922

.NET Open Source Workflow Engine, AI Empowerment

92 mcp-gateway ★ 903

MCP Gateway is a reverse proxy and management layer for MCP servers, enabling scalable, session-aware stateful routing and lifecycle management of MCP servers i

93 cofoundry ★ 902

Cofoundry is an extensible and flexible .NET Core CMS & application framework focusing on code first development

94 budget-board ★ 896

A simple app for tracking monthly spending and working towards financial goals.

95 mix.core ★ 888

🚀 A future-proof enterprise web CMS supporting both headless and decoupled approaches. Build any type of app with customizable APIs on ASP.NET Core/.NET Core.

96 DnsClient.NET ★ 881

DnsClient.NET is a simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups

97 wexflow ★ 844

Workflow Automation Engine

98 dev-proxy ★ 838

Simulate API failures, throttling, and chaos — all from your command line.

99 Etl.Net ★ 813

Mass processing data with a complete ETL for .net developers

100 GameFrameX ★ 771

An open-source toolbox that takes a game all the way "from idea → built → live" — Unity/Godot/Cocos/Laya clients + one .NET server. | 开源游戏全流程工具箱：Unity/Godot/Coc

101 TheIdServer ★ 756

OpenID/Connect, OAuth2, WS-Federation and SAML 2.0 server based on Duende IdentityServer and ITFoxtec Identity SAML 2.0 with its admin UI

102 keypaste ★ 752

A KeePass-compatible password and secrets manager for people who work with AI agents.

103 TumblThree ★ 742

A Tumblr and Twitter Blog Backup Application

104 EventViewerX ★ 734

Windows Event Log tooling for PowerShell and .NET: typed queries, reporting, export, WEC, automation, and the PSEventViewer module.

105 LLMTornado ★ 650

The .NET library to build AI agents with 30+ built-in connectors.

106 Gum ★ 650

Flexible layout tool for creating UI on any platform

107 TeslaLogger ★ 643

TeslaLogger is a self hosted data logger for your Tesla Model S/3/X/Y. Actually it supports RaspberryPi 3B, 3B+, 4B, Docker and Synology NAS.

108 Sportarr ★ 620

Sportarr - Sports PVR for usenet and torrents. Like Sonarr & Radarr but for sports events.

110 dd-trace-dotnet ★ 573

.NET Client Library for Datadog APM

111 FluentCMS ★ 569

ASP.NET Core Blazor Content Management System (CMS)

112 ModularPipelines ★ 559

Write your pipelines in C# !

113 EpubReader ★ 552

.NET library for reading EPUB files

114 taskbar-monitor ★ 548

monitoring tool with graphs (CPU, memory, disk and network) for Windows taskbar.

115 Camelot ★ 548

Camelot is a cross-platform file manager written in C#

116 Binner ★ 545

Open source parts inventory system for makers, electronics hobby, and professional engineers

117 api-bricks-sdk ★ 532

SDKs for CoinAPI & FinFeedAPI

118 Valour ★ 399

Community-driven platform built for transparency