ConnochaetOS

ConnochaetOS is a Libre GNU/Linux distribution for old computers, starting from a computer with a 586 processor, 64 MB RAM, and a 2 GB HD drive. It includes a full-featured WebKit-based Web browser, an email client, multimedia software, and office programs
http://www.connochaetos.org/

FAI - Fully Automatic Installation

FAI is a non-interactive system to install, customize and manage Linux systems and software configurations on computers as well as virtual machines and chroot environments, from small networks to large-scale infrastructures and clusters.
http://fai-project.org/

Hosting Controlpanel Kloxo.

Kloxo is a lightweight and powerful Web hosting panel that has been in development since 2002. It was formerly known as LxAdmin. It allows for adding customers, resellers, and wholesale resellers with few clicks. Clustering functions are also built in, so you can expand and add servers whenever you need. 
http://www.lxcenter.org/

Coreboot

coreboot (formerly known as LinuxBIOS) is a Free Software project aimed at replacing the proprietary BIOS (firmware) you can find in most of today's computers. It performs just a little bit of hardware initialization and then executes what is called a payload.
http://www.coreboot.org/Welcome_to_coreboot