Free Ubuntu 8.04.1with free security updates for at least 18 months

Ubuntu is an African word meaning 'Humanity to others'.

Ubuntu is a community developed operating system that is perfect for laptops, desktops and servers and Ubuntu is and always will be free of charge. You do not pay any licensing fees. You can download, use and share Ubuntu with your friends, family, school or business for absolutely nothing.
Ubuntu is designed with security in mind. You get free security updates for at least 18 months on the desktop and server. With the Long Term Support (LTS) version you get three years support on the desktop, and five years on the server. There is no extra fee for the LTS version, we make our very best work available to everyone on the same free terms. Upgrades to new versions of Ubuntu are and always will be free of charge.

There are now three ways for you to get Ubuntu:

1. Download the Ubuntu, Edubuntu or Kubuntu CD installer to your computer now.
2. Buy a CD or DVD with Ubuntu, Edubuntu or Kubuntu CD, or a large number of CDs from a distributor near you.
3. Request a free Ubuntu, Edubuntu or Kubuntu CD from Canonical.Delivery typically takes 6-10 weeks.

Source: www.ubuntu.com