Ubuntu

Ubuntu is a alternative operating system intended for "human beings" based off Linux. It is basically installed from a live CD meaning you can test drive without installing, but can be installed from a "Alternate CD", or CLI-based install CD. There are many editions available depending on your preference. Some editions are:
 * Ubuntu (regular, GNOME)
 * Kubuntu (KDE)
 * Xubuntu (Xfce)
 * Gobuntu (GNOME, only free software)