SLAX is pretty cool. Nice live linux cd, fits on a small cdr.
http://slax.linux-live.org/
SLAX CD contains
* Linux Kernel 2.4.25
* Xfree86 4.3.0
* KDE 3.2 final
* KOffice 1.3 final
* KDE games
* mplayer 1.0pre3
* kopete ICQ/AIM/Y!/IRC
* midnight commander
* rdesktop (rscp in KDE)
* hotplug support
* cdrtools
* k3b burning GUI for KDE
* imagemagick
* mutt email client
* wget
* and much more...