iloog is a Gentoo-based live CD targeted mainly at students and scientists. It features UnionFS filesystem support that enables you to write everywhere on the LiveCD and install extra packages, a graphical X environment through the Fluxbox window manager, many programming editors and IDEs, and a plethora of scientific applications, including Octave, Namd, Merlin, and full (La)TeX support.
Userful Live CD is a unique multiseat Linux live CD that lets one computer function as two. Booting from this CD temporarily transforms your dual-monitor PC or laptop (with an extra USB keyboard and mouse) into a "dual-seat" PC, supporting two independent users at the same time, each with their own monitor, keyboard, and mouse. A single keystroke links your keyboards and monitors. The live CD also includes Userful Multiplier and Userful Desktop.
NuFW.Live is a live CD based on knoppix. This is the simplest way to test the authenticating firewall NuFW and its associated tools. NuFW.Live features all NuFW's related software. It includes identity-based filtering rules to Netfilter, Nulog 2, a powerful firewall log analysis Web interface, Nuface 2, an ACL management interface, and pyctd, a Netfilter connection tracking display and modification interface.
Tin Hat is a Linux distribution derived from hardened Gentoo. It aims to provide a very secure, stable, and fast desktop environment that lives purely in RAM. Tin Hat boots from CD, or optionally USB pen drive, but it is not a LiveCD in that it does not mount any file system from the boot device. Rather, Tin Hat employs a massive squashfs image which expands into tmpfs upon booting. This makes for long boot times, but remarkable speeds during human-computer interaction.
GoblinX XFlash is an edition specially designed for 1GB USB pen drives. The system differs from MegaFlash because it includes GoblinX Mini 2.7 instead of the Premium edition, plus applications used to compile other programs from source code, several more applications for everyday use, some bindings and languages, games, and OpenOffice.org.
TurnKey Drupal is an extremely easy way to get up and running with Drupal in just a couple of minutes. It's a pre-integrated turnkey server based on Ubuntu that is packaged as a Live CD image capable of supporting installations on both physical and virtual machines, including VMWare, Xen, VirtualBox, and KVM. It features a small footprint, automatic security updates, a rich Web administration interface, and an easy to use configuration and installation console. It includes a dozen popular Drupal extensions for convenience.