Open Embedded Linux Entertainment Center (OpenELEC) is a small Linux distribution built from scratch as a platform to turn your computer into an XBMC media center. OpenELEC is designed to make your system boot fast, and the install is so easy that anyone can turn a blank PC into a media machine in less than 15 minutes.

   It's completely free
   A full install is only 80-125MB
   Minimal hardware requirements
   Simple install to HDD, SSD, Compact Flash, SD card, pen drive or other
   Optimized builds for Atom, ION, Intel, Fusion and more
   Simple configuration through the XBMC interface
   Plug and Play external storage
   File sharing out of the box