Only really OpenSSH from your list applies though. LibreSSL isn’t really in widespread usage outside of OpenBSD and has still been vulnerable to some of recent

Only really OpenSSH from your list applies though. LibreSSL isn’t really in widespread usage outside of OpenBSD and has still been vulnerable to some of recent the OpenSSL exploits. OpenNTPD is more widely used but lots of people still go for other alternatives and frankly I’m not convinced OpenNTPD offers anything significant over the competition anyway. pf is barely used outside of OpenBSD and frankly why should it be when Linux has iptables (which does the job well) and FreeBSD has ipfw (which also does the job well). pf is also a decent firewall but it’s also a crowded market with lots of really decent alternatives written by their respective platform hosts. I do actually quite like OpenBSD though. But outside of OpenSSH, OpenBSD is slowly becoming less relevant to the wider industry as other platforms catch up on security and even over take in terms of enterprise features.