.NET core API Gateway

An open source fork of Windows Live Writer

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

The mobile app vault (iOS and Android).

Open Source Web Application Framework for ASP.NET Core. Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET and the ASP.NET Core platforms. Provides the fundamental infrastructure, production-ready startup templates, application modules, UI themes, tooling, guides and documentation.

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

Linq to database provider.

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.

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

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

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

A cross-platform plotting library for .NET

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

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

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

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

💫 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.

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

Powerful .NET library for benchmarking

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

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

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

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