1.AvaloniaUI / Avalonia
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI
Ranked by Attention Score: stars gained over the last 90 complete days
79 repositories by Attention Score · Aug 5, 2026 – Nov 2, 2026 (UTC)
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
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.
The official repo for the design of the C# programming language
Bootstrap Blazor is an enterprise-level UI component library based on Bootstrap and Blazor.
Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 155+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI. If Radzen Blazor is useful to you, a ⭐ on GitHub helps other Blazor developers find it.
Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications
The P programming language.
Abstraction layer over YouTube's internal API
Human-readable schedule expressions for .NET (C#): write "every day at 9am except sunday" instead of cron. Time zones, fluent builder, custom keywords, cron converter.
:angel: The ultimate angle brackets parser library parsing HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specifications.
High performance Lua interpreter implemented in C# for .NET and Unity
Mono open source ECMA CLI, C# and .NET implementation.
Lightweight and fast library written in C# for reading Microsoft Excel files
ILGPU JIT Compiler for high-performance .Net GPU programs
Fluid is an open-source .NET template engine based on the Liquid template language.
A language where the code is written with folders
🌈A rich set of enterprise-class UI components based on Ant Design and Blazor.
Tools and libraries to glue C/C++ APIs to high-level languages
Cecil is a library to inspect, modify and create .NET programs and libraries.
Oqtane is an open-source developer productivity platform for building modern .NET applications and websites that run on Web, Desktop and Mobile.
Build all of your apps using what you already know and love ❤️
A C# parser construction toolkit with high-quality error reporting
Blazorise is a component library built on top of Blazor with support for CSS frameworks like Bootstrap, Tailwind, Bulma, AntDesign, and Material.
An interpreter for the Lua language, written entirely in C# for the .NET, Mono, Xamarin and Unity3D platforms, including handy remote debugger facilities.
Cross platform code coverage for .NET
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
Command line parsing, invocation, and rendering of terminal output.
The best C# command line parser that brings standardized *nix getopt style, for .NET. Includes F# support
PeachPie - the PHP compiler and runtime for .NET and .NET Core
Fast Compiler for C# Expression Trees and the lightweight LightExpression alternative. Diagnostic and code generation tools for the expressions.
Todo application with ASP.NET Core Blazor WASM, Minimal APIs and Authentication
A lightweight and fast parsing library for C#.
The official Firely .NET SDK for HL7 FHIR
Open-source cross-platform symbolic algebra library for C# and F#. Can be used for both production and research purposes.
The new generation Pascal programming language for .NET
Free Bootstrap 5 components for ASP.NET Blazor + optional enterprise-level stack for Blazor development (gRPC code-first, layered architecture, localization, auth, ...)
Clean Architecture Template for Blazor WebAssembly Built with MudBlazor Components.
Blazor Boilerplate / Starter Template with MudBlazor
A home for your business logic in any .NET application.
Blazor UI component library based on Material Design. Support Blazor Server, Blazor WebAssembly and MAUI Blazor.
When you publish your Blazor Wasm app, this package pre-renders and saves the app as static HTML files in your public folder.
A collection of code samples for the Uno Platform
ETL framework for .NET (Parser / Writer for CSV, Flat, Xml, JSON, Key-Value, Parquet, Yaml, Avro formatted files)
Use C# in web apps with comfort
A scripting language for .NET Core
The ultimate .NET Standard command line argument parser
Uno Calculator: A simple yet powerful iOS/Android/WebAssembly/Linux C# port of the calculator that ships with Windows
Components collection and extensions for Blazor applications.
A basic SVG editor written in Blazor.
Zero Allocation Writer/Reader Parser for .NET Core
A set of custom controls for the WinUI and the Uno Platform not offered out of the box by WinUI, such as Card, TabBar, NavigationBar, etc.
Blogifier is an open-source publishing platform Written in ASP.NET and Blazor WebAssembly. With Blogifier make a personal blog or a website.
IL2C - A translator for ECMA-335 CIL/MSIL to C language.
This library packages the well-known charting library plotly.js into a razor component that can be used in a Blazor project.
inVtero.net: A high speed (Gbps) Forensics, Memory integrity & assurance. Includes offensive & defensive memory capabilities. Find/Extract processes, hypervisors (including nested) in memory dumps using microarchitechture independent Virtual Machiene Introspection techniques
CleanAspire is a cloud-native template built on Aspire, using .NET 10 Minimal APIs and Blazor WebAssembly to deliver lightweight, scalable PWAs with offline support.
Cropper.js as Blazor component for cropping images
A simple to use blazor component to draw custom signatures.
Libraries to ease common developer tasks associated with building multi-platform mobile, desktop and web applications using Uno Platform or WinAppSDK.
[Archived] Parser and code generator for CSHTML files used in view pages for MVC web apps. Project moved to https://github.com/aspnet/AspNetCore
Grid component with CRUD for Blazor (client-side and server-side) and ASP.NET Core MVC
A Web UI Library based on Element and Blazor WebAssembly.
Roslyn based C# heap allocation diagnostic analyzer that can detect explicit and many implicit allocations like boxing, display classes a.k.a closures, implicit delegate creations, etc.
Puma Scan is a software security Visual Studio extension that provides real time, continuous source code analysis as development teams write code. Vulnerabilities are immediately displayed in the development environment as spell check and compiler warnings, preventing security bugs from entering your applications.
a C# embeddable lexer and parser generator (.Net core)
RapidCMS is a Blazor framework which allows you to build a responsive and flexible CMS purely from code. It provides a basic set of editors and controls, and is fully customisable.
Runtime parser for string expressions (formulas, method calls). Builds dynamic LINQ expression tree and compiles it to lambda delegate.
C# .NET 7 Blazor habit tracker application. Works on Web, Windows, Linux, Android, iOS and macOS.
Collection of applications based on a single C# .NET Standard project running in: Blazor Client (WebAssembly), Blazor Server, Electron, WPF, WinForms, Maui, WinUI3
The NuGet package that provides post published processing to deploy the ASP.NET Core SPA project (such as Blazor WebAssembly) as a GitHub pages site.