Rumor has it that Theo de Raadt, the venerable NetBSD developer forked this Distribution from NetBSD because of personality clashes. However, some like to believe that the reason was more technical since Theod de Raadt wanted to focus on security, open source nature, documentation, code quality, etc. As a result OpenBSD is called the most secured OS in the world, since it implements certain security features which others tend to ignore. In fact, OpenBSD’s logo is a Blowfish, the name of the popular security cipher.
Apart from the ones mentioned above there are more BSDs like DesktopBSD, DragonFlyBSD and a few other commercial, propreitary BSDs, but I think we have covered enough for one post.
