OpenBSD: Recent history

Release every six months (May and November), most recently OpenBSD 6.0 September 1, 2016 (41st release, 21 years)

Emphasis on security and usability (yes, devs run it on their laptops).

Home of several popular portable products (sub-projects):

• OpenSSH (ssh everywhere, 97% market share)
• OpenNTPD (network time daemon)
• OpenBGPD (routing daemon)
• PF ('firewall' - packet filter plus tools)
• OpenSMTPD (Mail server)
• OpenIKED (VPN key exchange)
• LibreSSL (libtls - remember Heartbleed?)

+ OpenBSD httpd, dhcpd, ipsec tools suite, full list at http://www.openbsd.org/innovations.html

Also invented hackathons - http://www.openbsd.org/hackathons.html

Since OpenBSD 3.0, every release has a song. OpenBSD 6.0 has 6 to mark end of CD releases