wrt54g-linux is a mini-distribution for the Linksys wrt54g 802.11b/g access point and router. It includes basic tools such as sh, syslog, telnetd, httpd (with cgi-bin support), vi, snort, mount, insmod, rmmod, top, grep, find, nfs modules, etc. The installation script runs in about 20 seconds and installs strictly to the RAM disk. If you mess anything up, simply reset the box. After installing the distribution you'll be able to telnet in, add Web pages, change iptable rules, change routing, configure snort, etc.
Gentoox is a 'port' of Gentoo Linux to the Xbox. It comes in Pro and Home flavors, where Pro is a Stage 3 bootable distribution with nothing else added (for developers and pros to customize themselves), and Home comes with many packages precompiled and installed, making it ideal for beginners or people who want their Linux to work straight out of the box. Installation time is minimal and totally fuss free.
ClusterKnoppix is a modified Knoppix distribution that uses the OpenMosix kernel. It features an OpenMosix terminal server that uses PXE, DHCP, and tftp to boot Linux clients via the network. It also includes openMosix auto-discovery, cluster management tools, and an optional X environment.
slapt-get is an APT-like system for Slackware package management. It allows you to search Slackware mirrors and third-party package sources (such as www.linuxpackages.net) for packages, compare them with installed packages, and install new packages or upgrade installed packages, all with a few simple commands.
Source Mage GNU/Linux is a source-based Linux distribution based on a magical metaphor of "casting" and "dispelling" programs, which are referred to as "spells". In multi-tasking style, it downloads the sources in the background while compiling in the foreground. Source Mage's "sorcery" offers advanced package management, but retains the choices, options, and control not offered by many other distributions.