Microsoft is certainly embracing open source. It looks like Mono is still with us after open sourcing .NET, though it's now sponsored by Microsoft. They bought

Microsoft is certainly embracing open source. It looks like Mono is still with us after open sourcing .NET, though it's now sponsored by Microsoft. They bought GitHub and kept it running. Are they still doing the extend with useful features not found elsewhere part? I don't follow their stack closely enough to know.