Winik : Windows & *nix synergy : HomePage
“Winik is a cygwin distro that users can install in Windows like other applications program. Winik is unix like and users can select program from Start button and menus.
Users can select other wm such as KDE, Gnome, Icewm, Wmaker, Xfce etc. Winik give a taste of *nix to windows users. Winik are based on x/cygwin. Users can install Winik modules just likes other Windows application.”
More in the world of emulation:) It is worth poking around with stuff like this to get an idea of what there is outside of Windows.