An open source, UNIXÂ®-like operating system An advanced operating system derived from the Berkeley Software Distribution (BSD), the version of UNIXÂ® developed at the University of California, Berkeley. Basically it's like Linux but more suited to web hosting than being a desktop OS. Find out more: The FreeBSD site.
FreeBSD is an advanced operating system for x86 compatible, DEC Alpha, IA-64, PC-98 and UltraSPARC architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. FreeBSD offers advanced networking, performance, security and compatibility features today which are still missing in other operating systems, even some of the best commercial ones. FreeBSD makes an ideal Internet or Intranet server. It provides robust network services under the heaviest loads and uses memory efficiently to maintain good response times for thousands of simultaneous user processes. We are using FreeBSD on almost all of our servers.