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.
SliTaz is an operating system that provides a fully featured desktop or server in less than 30 Mb. SliTaz is simple to use, fast, and stable. In Live CD or USB mode, it runs entirely in memory (RAM). SliTaz has an active community all over the world and can be used in several languages.
SpamCheetah is a network-level spam filtering solution built around OpenBSD greylisting, tarpit, and blacklisting. It comes with a Web interface and requires zero administration. It does not allow spam to even land in your network, thus saving you precious bandwidth. It does not have the 'false positives' problem of losing legitimate mail.
DoudouLinux is a system specially designed for children 2 years and up. It is available as Live CDs and USB keys as well as ARM images. The main goals are to be as easy to use as a game console, provide as many kid-oriented applications as possible (currently around 50), drive small children into mastering computer use from age 2, be natively in child-friendly language without any action, be simple for Dad and Mom too (no administration, no updates; it’s a read-only system). It includes Web content filtering.
MaheshaNetBSD is a NetBSD Live USB distribution which has the IceWM Desktop and the same feel as all the author's MaheshaBSD-based products. A LiveCD can easily be made from it by running the /makeiso script in the root directory. It can be used for many things like viewing presentations (PDF files, images, etc.), handling recovery tasks, playing music, playing chess, surfing the Internet, etc. Linux emulation is activated. The advantage of this LiveUSB is that the USB pendrive is writable after booting (unlike other MaheshaBSD products), and users can thus easily install packages from the Internet. However, as USB flash drives do not like too many writes, the author keeps a few directories in memory (/tmp, /var, /etc.). MaheshaNetBSD lets you can write in Sanskrit.
RCPlive is a router live CD based on Debian 7 and the RCP100 routing suite. It is a flexible firewalling and routing platform, configured using a command line interface syntax similar to the one found in commercial routers. The software runs directly from a read-only CD or USB stick, and provides persistence by saving the configuration into a file placed on an existing disk partition.