Server

http:/ / www.knopper.net/ knoppix/ index-en.html
KNOPPIX is a bootable CD with a collection of GNU/Linux software, automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals. KNOPPIX can be used as a Linux demo, educational CD, rescue system, or adapted and used as a platform for commercial software product demos. It is not necessary to install anything on a hard disk. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it.

https:/ / lg3d-livecd.dev.java.net/
It is an environment for Linux, like KDE or Gnome, but with some really great 3D functionality. More than just eye-candy, LG3D provides functional use of an extra spatial dimension on your desktop.

http:/ / www.ubcd4win.com/
UBCD4Win is a bootable CD which contains software that allows you to repair/restore/diagnostic almost any computer problem. With network support, the ability to modify NTFS volumes, recover deleted files, create new NTFS volumes, scanning hard drives for viruses, etc. this project is almost everything you need to repair your system problems. Additional applications included are CD Burning, Backup/cloning, Defragmenter's, Password recovery, the list goes on!