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

CodeHub is an iOS application written using Xamarin

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.

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

GraphQL for .NET

PerfView is a CPU and memory performance-analysis tool

Core functionality needed to create .NET Core projects, that is shared between Visual Studio and CLI

Headless CMS and Content Managment Hub

Durable Task Framework allows users to write long running persistent workflows in C# using the async/await capabilities.

A GraphQL Client for .NET Standard

HTTP wrapper around NRefactory allowing C# editor plugins to be written in any language.