cAos
http://caos.caosity.org/
http://www.caosity.org/
http://freshmeat.net/projects/caos/
cAos is a Linux distribution created by the community, for the
community. The purpose is to provide a stable Linux solution for
organizations and individuals that do not need or want to purchase their
Linux solution. The kernel and almost every application that makes up a
Linux distribution are free and supported by their respective development
groups. cAos is simply a project that allows them to integrate together
into a usable product. This distribution is focused on becoming an
enterprise level community produced solution. The project was announced
November 8, 2003, followed by the first alpha release on December 1,
2003. cAos 2 was released May 13, 2005 for ia32 & x86_64. Caos
Server 3.0 BETA-1 was released September 20, 2006.
Catapulta
http://www.catapulta.org/
Catapulta is an Ubuntu-based server platform that is designed and
packaged specifically for high-performance network monitoring
applications using commodity hardware. Catapulta distinctly incorporates
enhancements tailored for high-speed packet capture, including kernel
modifications and software optimizations. It integrates PF_RING, a
zero-copy packet capture technology, and Streamline, a fast stream
reassembler and filter -- as standard kernel features. Catapulta RC2 was
released February 19, 2008.