Open source releases from Microsoft
CoreFX is the foundational class libraries for .NET Core. It includes types for collections, file systems, console, JSON, XML, async and many others.
ShaderConductor is a tool designed for cross-compiling HLSL to other shading languages
Infer.NET is a framework for running Bayesian inference in graphical models
Easy to get started sample reference microservice and container based application. Cross-platform on Linux and Windows Docker Containers, powered by .NET Core 2.1, Docker engine and optionally Azure, Kubernetes or Service Fabric. Supports Visual Studio 2017, VS for Mac and CLI based environments with Docker CLI, dotnet CLI, VS Code or any other code editor.
A fast, distributed, high performance gradient boosting (GBDT, GBRT, GBM or MART) framework based on decision tree algorithms, used for ranking, classification and many other machine learning tasks. It is under the umbrella of the DMTK(http://github.com/microsoft/dmtk) project of Microsoft.
Open source simulator for autonomous vehicles built on Unreal Engine / Unity, from Microsoft AI & Research