ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.

Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.

Lean Algorithmic Trading Engine by QuantConnect (Python, C#)

Highly performant and modular controls for node-based editors designed for data-binding and MVVM.

Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows

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

.NET for Apache® Spark™ makes Apache Spark™ easily accessible to .NET developers.

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

ML.NET is an open source and cross-platform machine learning framework for .NET.

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

xUnit.net is a free, open source, community-focused unit testing tool for .NET.

Mutation testing for .NET core and .NET framework!

Linq to database provider.

Headless Chrome .NET API

.NET API Gateway

Open-source platform for building cross-platform native Mobile, Web, Desktop and Embedded apps quickly. Create rich, C#/XAML, single-codebase apps from any IDE. Hot Reload included! 90m+ NuGet Downloads!!

One framework for creating powerful cross-platform games.

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

Command line parsing, invocation, and rendering of terminal output.

An open source fork of Windows Live Writer

This repository contains a suite of libraries that provide facilities commonly needed when creating production-ready applications.

AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.

Powerful .NET library for benchmarking