I would say that for a lot of daemons OpenBSD ends up with more interesting and cleaner versions than some of the ancient BSD ilk or with some of the complexity of the GNU replacements. It's often a lot easier to port part of/some of an OpenBSD daemon with just a little bit of hacking around instead of figuring out a bigger autotools chain.
That said, OpenBSD does introduce new stuff often. Over the years, they've periodically rewritten a handful of crusty old daemons for example.