Auditor: The security tool collection
The Auditor security collection is a GPL-licensed live CD based on Knoppix, with more than 300 security software tools. Auditor gives you easy access to a broad range of tools in almost no time.
To get started, download the latest image of Auditor and burn it as a bootable image. Remember to use the image option -- just copying the file will not produce a bootable image. After you have successfully written the image to disc, you can start Auditor directly from the CD. It will not install any permanent software on the hard disk unless you request it to, so don't be nervous to use Auditor on a client workstation.