We already know that Microsoft is now very comfortable with open source and stuff. We have seen several projects from Microsoft moving to Github. Today, Microsoft revealed that they are opening up their web platform for 3rd party contributions. Adobe’s Web Platform Team has helped Microsoft make key improvements for a more expressive Web experience in Windows 10. Their contributions are already available in the Project Spartan web platform available in Windows 10 Technical Preview released in March.
Adobe is a major contributor to open source browser engines such as WebKit, Blink, and Gecko. In the past, it was challenging for them (or anyone external to Microsoft) to make contributions to the Internet Explorer code base. As a result, as Adobe improved the Web platform in other browsers, but couldn’t bring the same improvements to Microsoft’s platform. This changed a few months ago when Microsoft made it possible for the Adobe Web Platform Team to contribute to Project Spartan. The team contributes in the areas of layout, typography, graphic design and motion, with significant commits to the Web platform. Adobe engineers Rik Cabanier, Max Vujovic, Sylvain Galineau, and Ethan Malasky have provided contributions in partnership with engineers on the IE team.
Read more about it here.