whatisgithub

Popular C# repositories on GitHub, each answered in plain English for non-coders: what it is, its tech stack, and how to run it.

• dotnet/yarpA Microsoft open-source toolkit for building custom reverse proxy servers in .NET — you embed it in your own a
• reactiveui/refitA C# library that turns a simple interface definition into a fully working HTTP client — you describe your RES
• autodarkmode/windows-auto-night-modeA lightweight Windows app that automatically switches between dark and light themes on Windows 10/11 on a sche
• litedb-org/litedbLiteDB is a tiny embedded NoSQL document database for .NET apps that stores everything in a single file — no s
• signalr/signalrA .NET library that lets web servers push real-time updates to connected browsers — used for live chat, auto-u
• lepoco/wpfuiA C# library that gives existing Windows desktop apps the modern Windows 11 look without rewriting them — inst
• dotnet/machinelearningML.NET is Microsoft's free, open-source machine learning library for C# and .NET developers — train models, ru
• xincger/unity3dtrainingA personal archive of over 50 Unity3D learning projects and code samples covering game mechanics, UI, performa
• perfare/il2cppdumperA reverse engineering tool that recovers class names, method names, and type info from compiled Unity il2cpp g
• jynew/jynewJynew is a completed open-source Unity game framework that recreates a classic 1996 Chinese wuxia RPG in 3D, s
• git-ecosystem/git-credential-managerA sign-in helper for Git that handles two-factor authentication with GitHub, GitLab, Azure DevOps, and Bitbuck
• jeffreysu/weixinmpsdkA .NET library for building WeChat integrations in C#. It wraps WeChat's APIs for Official Accounts, Mini Prog
• threemammals/ocelotOcelot is a .NET API gateway library that routes all client requests through a single entry point, with built-
• raywangqvq/bilibilitoolproAn automation tool for the Bilibili video platform that runs your daily login, video-watching, and other point
• davidfowl/aspnetcorediagnosticscenariosA reference collection of real broken code patterns found in ASP.NET Core web applications, with explanations
• reactiveui/reactiveuiReactiveUI is a C# framework for building .NET apps where the UI automatically updates when data changes, usin
• gitextensions/gitextensionsA visual desktop app for Windows that lets you browse Git history, commit changes, and manage branches without
• technitiumsoftware/dnsserverA free self-hosted DNS server that encrypts your browsing lookups to keep them private from your ISP, blocks a
• librehardwaremonitor/librehardwaremonitorLibre Hardware Monitor is a free Windows app and .NET library that reads live temperatures, fan speeds, voltag
• gibbed/steamachievementmanagerA lightweight portable Windows tool for viewing and modifying Steam game achievements and statistics on your a
• borntoberoot/networkmanagerA free, open-source Windows app that combines over a dozen network tools — remote desktop, SSH, port scanner,
• assetripper/assetripperA desktop application that extracts assets from Unity games — images, sounds, 3D models, and scripts — from th
• xm4ddy/ofgbA small Windows 11 desktop app that removes Microsoft-added advertisements from File Explorer and the Start Me
• bartoszcichecki/lenovolegiontoolkitA lightweight Windows utility that replaces Lenovo's bloated Vantage software, giving you control over fan spe
• de4dot/de4dotA free .NET deobfuscator that cleans up scrambled, encrypted, or obfuscated .NET binaries from over 20 known o
• pixieditor/pixieditorPixiEditor is a free, open-source 2D graphics editor for Windows that combines pixel art, painting, and vector
• ricosuter/nswagA .NET toolset that reads your ASP.NET Core web API and automatically generates OpenAPI documentation and read
• neuecc/unirxUniRx is a Unity library that replaces messy coroutine code with clean, stream-based event handling, letting g
• mob-sakai/uieffectA Unity package that adds visual effects — blur, grayscale, dissolve, and glowing outlines — to any UI element
• yaobiao131/downkyicoreA cross-platform desktop app for downloading videos from Bilibili in high-quality formats including 8K, HDR, a
• dotnet/reactiveA set of C# libraries for working with live data streams — stock feeds, sensor readings, user clicks — using t
• nancyfx/nancyArchived C# web framework for building HTTP APIs on .NET that minimized boilerplate so your route code stayed
• dotnetcore/capA .NET library that makes microservice messaging reliable by storing outgoing messages in your database before
• louthy/language-extA C# library that adds functional programming patterns — immutable types, optional values, composable error ha
• handyorg/handycontrolA collection of polished, ready-to-use interface components for Windows desktop apps built with WPF (C#), incl
• quartznet/quartznetA job scheduling library for .NET apps that lets you run background tasks automatically on a timer, fixed inte
• thebookisclosed/viveA C# library and ready-to-use command-line tool for toggling hidden Windows feature flags — the same internal
• hmbsbige/shadowsocksr-windowsA Windows desktop app with a graphical interface for connecting to a ShadowsocksR proxy server, helping users
• builtbybel/flyoobeFlyOOBE lets you install Windows 11 on computers that fail Microsoft's hardware requirements like TPM 2.0 and
• randyrants/sharpkeysA simple Windows app for remapping keyboard keys — make Caps Lock act as Ctrl, swap two keys, or disable a key
• stranslate/stranslateSTranslate is a portable Windows desktop app for translating text and extracting text from images using OCR —
• jstedfast/mailkitA .NET library that lets applications send and receive email using SMTP, IMAP, and POP3, with support for OAut
• prismlibrary/prismA C# framework for building organized, testable desktop and mobile apps on WPF, MAUI, Avalonia, Uno, and WinUI
• eduardopires/equinoxprojectA .NET 9 reference application that shows Domain-Driven Design, CQRS, and Event Sourcing working together in a
• ellanjiang/gameframeworkA set of 19 ready-made Unity modules covering asset loading, UI, scenes, audio, networking, and more, so C# ga
• philippc/keepass2androidKeepass2Android is a free Android password manager that stores credentials in an encrypted KeePass-compatible
• azure/azure-sdk-for-netThe official Microsoft SDK for .NET developers to connect their C# applications to Azure cloud services — cove
• graphql-dotnet/graphql-dotnetAn open-source GraphQL server library for .NET — lets you build APIs where clients request exactly the data th
• shimat/opencvsharpA .NET/C# wrapper for OpenCV that lets you do image processing, object detection, video streaming, and compute
• gerardog/gsudogsudo is a Windows utility that lets you run any terminal command with administrator permissions by prefixing
• sylinko/everywhereEverywhere is a desktop AI assistant for Windows and macOS you summon with a keyboard shortcut to instantly an
• microsoft/aspireMicrosoft Aspire lets you describe all the pieces of a multi-service app in code, then starts them in the righ
• veriorpies/parrelsyncParrelSync is a Unity extension that lets you run multiple Unity editor windows at once to test multiplayer ga
• 1remote/1remoteA Windows app that brings all your remote connections — Remote Desktop, SSH, VNC, FTP, and more — into one sea
• fastendpoints/fastendpointsFastEndpoints is a C# library for building REST APIs that replaces boilerplate-heavy MVC Controllers with a cl
• danielgerlag/workflow-coreWorkflow Core is a .NET library for defining and running long-running multi-step processes in C# — with state
• dotnetnext/sqlsugarAn easy-to-use .NET ORM framework that lets you read and write data to many different databases using C# code
• kurrent-io/kurrentdbAn event-sourcing database (formerly EventStoreDB) that stores every change as an ordered sequence of events r
• lambci/docker-lambdaRun and test AWS Lambda functions locally using Docker containers that exactly replicate the Lambda cloud envi
• nickvisionapps/parabolicA desktop app that downloads video and audio from hundreds of websites using yt-dlp under the hood, with a cle
• mob-sakai/particleeffectforuguiUnity package that renders particle effects (confetti, sparks, glows) directly inside uGUI canvases without ex
• chillicream/graphql-platformAn open-source suite of .NET tools for GraphQL — a server called Hot Chocolate, a typed client code generator
• dorssel/usbipd-winA Windows background service that lets you share any USB device plugged into your Windows PC with a Linux envi
• dockersamples/example-voting-appA sample multi-container voting app from Docker that shows how five services (Python, Node.js, .NET, Redis, Po
• proxysu/proxysuProxySU is a Windows desktop app that automates one-click installation of proxy server software (V2ray, Xray,
• hanmin0822/misakatranslatorMisakaTranslator is a Windows tool that reads on-screen text from Japanese visual novels and games in real tim
• win-acme/win-acmewin-acme is a Windows tool that automatically gets SSL certificates from Let's Encrypt and other providers and
• microsoft/wpf-samplesMicrosoft's official collection of small, self-contained code examples showing how to use specific WPF feature
• closedxml/closedxmlC# library for creating, reading, and editing Excel spreadsheets from .NET apps without needing Microsoft Exce
• builtbybel/bloatynosyA standalone Windows 11 tool that removes pre-installed bloatware, unwanted features, and default settings you
• aspnet/mvcAn archived read-only snapshot of the original ASP.NET Core MVC source code — Microsoft's C# framework for bui
• xamarin/xamarin.formsXamarin.Forms was a cross-platform C# toolkit for building iOS, Android, Windows, and macOS apps from a single
• live-charts/live-chartsLiveCharts is an animated charting library for .NET Windows desktop apps (WPF and WinForms) supporting bar, li
• rmcrackan/libationA free desktop app for Windows, macOS, and Linux that downloads your Audible audiobooks and removes the DRM lo
• dotnet/msbuildMSBuild is Microsoft's build system for .NET projects. It reads XML project files and compiles source code int
• mouredev/one-day-one-languageA beginner-friendly learning project that introduces a new programming language each week through video lesson
• dotnet/winformsWindows Forms (WinForms) is Microsoft's open-source .NET 6+ framework for building Windows desktop application
• inkle/inkA scripting language and runtime for writing interactive branching stories — used by writers in the Inky edito
• thejoefin/text-grabA Windows utility that copies text from any part of your screen — including photos, videos, and locked apps —
• microsoft/fluentui-blazorReady-made buttons, data grids, dialogs, and navigation menus for Blazor web apps that look like Microsoft 365
• zalo/mathutilitiesA grab-bag of math and physics algorithms for Unity in C#, covering mesh deformation, inverse kinematics, soft
• azure/azure-powershellThe official Microsoft PowerShell module for managing Azure cloud resources from the command line — create VMs
• indiff/qttabbarA Windows Explorer plugin that adds browser-style tabs to your file manager. Open multiple folders in one wind
• atom0s/steamlessSteamless is a C# tool that strips SteamStub DRM from Steam game executables you legally own, letting you unde
• cobbr/covenantA web-based command and control framework for authorized red team security testing, letting multiple operators
• dotnetcore/bootstrapblazorA library of ready-made UI components for Microsoft Blazor that combines Bootstrap's visual style with C#-firs
• microsoft/perfviewA free Windows tool from Microsoft that records CPU and memory activity in a running .NET application so you c
• davidobot/betterjoyA Windows app that makes Nintendo Switch controllers work with PC games and emulators over Bluetooth or USB, i
• autofac/autofacA .NET library that automatically wires together the objects your application needs so you do not have to manu
• bililiverecorder/bililiverecorderA Windows desktop app that watches Bilibili live streams and records them automatically when they start, handl
• qianmo/unity-design-patternA Unity C# project with working implementations of all 23 classic Gang of Four design patterns plus game-speci
• sebastienros/jintA JavaScript interpreter you add to a .NET app as a NuGet package, letting you run JavaScript code inside C# w
• dotnetcore/utilA C# application framework for .NET that wraps popular third-party libraries into unified, simpler APIs with a
• igormundstein/winmemorycleanerA free portable Windows utility that manually clears RAM held by closed apps using official Windows APIs, with
• xunit/xunitxUnit.net is a free, open-source testing framework for .NET that lets you write and run automated tests in C#,
• ghostpack/seatbeltA Windows security audit tool that runs dozens of read-only checks and reports what an attacker or defender wo
• seblague/digital-logic-simA visual simulator for digital logic circuits where you place basic gates like AND, OR, and NOT and watch sign
• hmbsbige/nattypetesterA Windows tool written in C# that checks how your router handles NAT by running STUN protocol tests, reporting
• opserver/opserverOpserver is the internal monitoring dashboard Stack Exchange (Stack Overflow's company) open-sourced — a singl
• accord-net/frameworkA .NET library covering machine learning, statistics, and computer vision for C# developers who want to do dat

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