I’ve added a section of links on the page (right menu for those who only see me through RSS) for security-related LiveCDs. I know, I’m missing some old ones like PHLACK, Whax, and even Knoppix-STD, but I’d like to link only actively supported and recent editions. So far I’m only listing backtrack (duh), NST, nubuntu, owasp, pentoo, and samurai.
I may adjust this section and include virtual images as well, since there are some pen-test target and tool images out there, like the recently announced Securix Network Security Monitoring virtual image (the sheriff badge logo has got to go, lol!). Really, these days there is not too much difference between a livecd and a virtual image in your pocket, assuming you control the target system.