Headless Chrome .NET API

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

An open source fork of Windows Live Writer

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

The best C# command line parser that brings standardized *nix getopt style, for .NET. Includes F# support

Build Mobile, Desktop and WebAssembly apps with C# and XAML. Today. Open source and professionally supported.

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.

High performance and modular controls for node-based editors designed for data-binding and MVVM.

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.

A cross-platform plotting library for .NET

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

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

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

Every programmer needs a rubberduck. COM add-in for the VBA & VB6 IDE (VBE).

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

MonoDevelop is a cross platform .NET IDE

💫 NClient is an automatic type-safe .Net HTTP client that allows you to call web service API methods using annotated interfaces or controllers without boilerplate code.

Powerful .NET library for benchmarking

Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers.

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

Mono open source ECMA CLI, C# and .NET implementation.

Open source, headless, multi-tenant eCommerce platform built with .NET Core, MongoDB, AWS DocumentDB, Azure CosmosDB, Vue.js.

Linq to database provider.

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

.NET core API Gateway

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

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