Gentoo Linux

Homepage: http://www.gentoo.org/
USSG Mirror: ftp://ftp.ussg.indiana.edu/linux/gentoo/releases/

Taken from Wikipedia
The Gentoo Linux operating system (pronounced /'dʒɛntu/) is a Linux distribution named after the Gentoo penguin. It is designed to be modular, portable, easy to maintain, flexible, and optimized for the user's machine. All tools and utilities are built from source code. For convenience, however, several large software packages are also available as precompiled binaries for various architectures via the Portage system.

Gentoo is also available on more architectures than most other Linux distributions. Although originally designed for the x86 architecture, it has been ported to many others and currently runs on the x86, PowerPC, PowerPC 970, SPARC, x86-64, IA64, MIPS, DEC Alpha, PA-RISC, ARM, zSeries/s390, SuperH and 68k architectures. Gentoo was the first distribution to offer a fully functional 64-bit Linux computing environment (user space and the kernel) for the PowerPC 970 (G5).