"SLAX is a small bootable CD containing the Linux operating system. It runs Linux directly from the CD without installing. The Live CD described here is based on the Slackware Linux distribution and is downloadable from this website as an ISO image. All scripts and source code are available and can be used to build your own Live CD. Imagine the ability to boot your favorite Linux distribution whether you are at home, at school, or at work. Imagine walking on the street and carrying the only thing you needed in life - the 8cm compact disk with your Live Linux CD. Wouldn't you want to experience such a feeling?:-)" - slax.linux-live.org
Check out our screenshots here."