Snow Leopard Transformation pack for Windows XP based on MAC OS X Snow Leopard. It was created by a deviantart user.

Check out this cool Ubuntu transformation pack for you Windows XP. This transformation pack was designed for Windows XP and it's based on Ubuntu 11.04 Natty Narwhal

Check out this cool Ubuntu transformation pack for you Windows 7 OS. This transformation pack was designed for Windows 7 and it's based on Ubuntu 11.04 Natty Narwhal

Apple Mac OS X Transformation pack for windows XP based on the looks of Mac OS X Lion 10.7. It is created by a deviantart