Knoppix is quite an unusual and fascinating LinuxDistribution.
It's a single bootable CD, with 1.8GB of compressed data on it. The entire distribution runs solely off the CD-ROM, not touching your harddisk at all unless you so desire. The CD also includes some of the best automatic hardware detection I've seen which gets everything running in KDE immediately. A perfect demo disk, and rescue CD.
The CD contains KDE (and GNOME?), OpenOffice.org, Mozilla and heaps of other software.
I highly recommend you download and try a copy, you'll be surprised.
