Microsoft PowerToys is a collection of utilities that help you customize Windows and streamline everyday tasks

Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET UI client technology

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

Google's Material Design in XAML & WPF, for C# & VB.Net.

A framework that allows developers to cobble together a better UI for their own WPF applications with minimal effort.

The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.

Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities

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 sta…

.NET deobfuscator and unpacker.

Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono

Telegram for Windows

Simple, powerful, cross-platform SQLite client and ORM for .NET

The .NET MVVM framework for cross-platform solutions, including Android, iOS, MacCatalyst, macOS, tvOS, WPF, WinUI

Cross platform GUI framework for desktop and mobile applications in .NET

Roslynator is a set of code analysis tools for C#, powered by Roslyn.

Linq to database provider.

Reads and writes .NET assemblies and modules

Dragable and tearable tab control for WPF

Avalonia-based .NET Decompiler (port of ILSpy)

SharpShell makes it easy to create Windows Shell Extensions using the .NET Framework.

Microsoft Authentication Library (MSAL) for .NET

Making Windows 10 apps great again

A cross-platform UI toolkit for creating desktop applications with .NET and Mono

Telerik UI for Universal Windows Platform (UWP) is no longer supported.

Easy-to-use typesafe REST API client library for .NET Standard 1.1 and .NET Framework 4.5 and higher, which is simple and customisable. Inspired by Refit

DryIoc is fast, small, full-featured IoC Container for .NET

Performance comparison of .NET IoC containers

AOP framework for .NET (c#, vb, etc)

ODataLib: Open Data Protocol - .NET Libraries and Frameworks

Advanced WPF Binding which supports expressions in Path property and other features