Came across this interesting project while surfing today - ReactOS
I wonder why a lot of OSS projects are still blindly copying Microsoft Windows GUI, when they can come up with much better GUI and features than what Windows provides!

“The ReactOS project is dedicated to making Free Software available to everyone by providing a ground-up implementation of a Microsoft Windows XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface.”
ReactOS Homepage - Frontpage