Zentoo Linux is variant of Gentoo Linux with an emphasis on server deployment on x86_64 platforms.
Zentoo Linux – just like Gentoo Linux – is a source based Linux distribution with a live package tree. Zentoo Linux is at the same time more conservative and more bleeding-edge. Package updates tend to happen in batches that are known to work reliably. Still package versions tend to be more up-to-date and new server-related packages have been added to the tree.
Zentoo Linux also provides a bunch of experimental overlays for special setups (like Continuous Integration system needing X11 and browsers) and for testing experimental new packages. For a list of available overlays refer to the Zentoo Github account.
Prebuilt Zentoo Linux images can be found at zentoo.org/downloads.