GreenGnome is a free, modern desktop environment for Windows XP. Written completely from scratch, it aims to become the first Windows like operative system and follow the Windows architecture designed by Microsoft from the hardware level right through to the application level. This is not a Unixlike based system (as GNU/Linux).
The main goal of the GreenGnome project is to provide an operating system which is binary compatible with Windows. This will allow your Windows applications and drivers to run as they would on your Windows system. Additionally, the look and feel of the Gnome desktop environment is used. The ultimate goal of GreenGnome is to allow you to remove Windows and install GreenGnome. Read more: GreenGnome