ZDNet has posted a review of the BSD-variant OpenBSD. “Unlike other operating systems, with the exception of close relative NetBSD, the open source OpenBSD was built from the ground up to be secure. How do they do it? In no small part, it's by constantly auditing the operating system's code for potential security problems.”
“Since 1996, the operating system has had a team of auditors working on finding potential problems and fixing them before they can develop into security holes. OpenBSD, which runs on the Intel platform but has been ported to many others, is also a big believer in fully disclosing any potential security problems to the public as they come up and then immediately attacking and fixing them.”