GNU (GNU is Not Unix)
GNU/Linux is a free (as in freedom (also; gratis, libre, kostenlos, Freiheit, etc+)) Operating System with linux at the kernel level… .
distros
mainly debian, see Debian Notes
liveCD distros / installers
- dyne:bolic
- multimedia based distro » http://dynebolic.org/
- knoppix (-based) http://www.knoppix.org/
- morphix
- mepis (debian based)
- redhat / kickstart
- FAI (fully automatic installation) to install debian across a cluster or multiple hosts http://www.informatik.uni-koeln.de/fai/