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

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

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

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

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.

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

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

One framework for creating powerful cross-platform games.

.NET API Gateway

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

An open source fork of Windows Live Writer

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

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

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

Powerful .NET library for benchmarking

Mutation testing for .NET core and .NET framework!

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

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.

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

Headless Chrome .NET API