GentooLinux

Gentoo Linux is a versatile and fast, completely free Linux distribution for x86, PowerPC, UltraSPARC and Alpha systems that's geared towards Linux power users. Unlike other distros, Gentoo Linux has an advanced package management system called Portage. Portage is a true ports system in the tradition of BSD ports, but is Python-based and sports a number of advanced features including dependencies, fine-grained package management, "fake" (OpenBSD-style) installs, path sandboxing, safe unmerging, system profiles, virtual packages, config file management, and more.