Powerful .NET library for benchmarking

Open Source Web Application Framework for ASP.NET Core

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

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

The mobile app vault (iOS and Android).

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

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

An open source fork of Windows Live Writer

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.

💫 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.

One framework for creating powerful cross-platform games.

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

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

Headless Chrome .NET API

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

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

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

A cross-platform plotting library for .NET

Linq to database provider.

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

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

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

.NET core API Gateway

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

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

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