64 Studio is a collection of native free software for digital content creation on x86_64 hardware (AMD's 64-bit CPUs and Intel's EM64T chips). It's based on the pure 64 port of Debian GNU/Linux, but with a specialised package selection and lots of other customisations. The distribution includes the Linux kernel with realtime preemption patches, the GNOME desktop, and a selection of creative applications, covering audio and music, 2D and 3D graphics, and publishing for the Web and print. It also includes Internet and office tools that a creative user is likely to need for their daily work.
A.M.I.C.U.S. (Automatic Multimedia Installation Configuration Utility System) helps users quickly and easily install and configure MythTV on generic PC hardware. It uses the Debian Netinst CD to install GNU/Linux and just the required packages to allow a functional MythTV on low end hardware.
Annvix is a secure Linux server distribution. The goal is to provide an easy-to-use server distribution with high security features including a Linux kernel with AppArmor support, gcc with stack protection, and secure defaults for all services. It also includes unique features such as running all services under runit, and auditing tools such as rsec (msec's baby brother), aide, snort, and rkhunter. It uses apt-get (for RPM) for package management.
The Auditor security collection is a live-system based on KNOPPIX. It provides tools for analyzing the security of a system. It features a menu structure that reflects the stages of a security check: foot-printing, analysis, scanning, wireless, brute-forcing, cracking. In addition to about 300 security tools, the collection includes background information regarding standard configuration and passwords, truly extensive word lists, and more mundane productivity tools.
BLAG is a single-CD Linux distribution that has a suite of graphics, Internet, audio, video, office, and peer-to-peer file sharing applications. It is based on Fedora Core, Dag, Freshrpms, etc. It is up-to-date with all Fedora errata updates at the time of release, and uses apt/synaptic for easy upgrades and installation of new applications.
BeatrIX Linux is a 180-megabyte live CD that is also installable to hard drive. It features kernel 2.6.7, Gnome 2.8, Evolution 2.0, Firefox 1.0 with AdBlock, Open Office 1.1.2, Vim, Apt, xPDF and more. It tracks the Ubuntu package repository. It was originally built for the mini-ITX motherboards from Via, but it runs on just about any Pentium-class PC with 64 megs of RAM or more. It's a get-the-job-done distribution for people who want the basics.