Wikipedia
AndLinux
andLinux is an Ubuntu-based system using the Linux kernel designed to run a Linux environment natively on Windows systems (2000, XP, 2003, Vista, 7; 32-bit versions only). It is a FLOSS software being released under the GNU GPL license. It uses the coLinux kernel to run, Xming to run X Window, PulseAudio for sound, and has the option of either using a stripped down version of KDE or Xfce.