The new Windows Terminal and the original Windows console host, all in the same place!

Protocol Buffers - Google's data interchange format

C++ based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

Windows Calculator: A simple yet powerful calculator that ships with Windows

The 2013 edition of the Source SDK

WinUI: a modern UI framework with a rich set of controls and styles to build dynamic and high-performing Windows applications.

The Windows App SDK empowers all Windows desktop apps with modern Windows UI, APIs, and platform features, including back-compat support, shipped via NuGet.

Service Fabric is a distributed systems platform for packaging, deploying, and managing stateless and stateful distributed applications and containers at large scale.

Bond was a cross-platform framework for working with schematized data. The open-source project ended on March 31, 2025.