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References invaluable for any OpenBSD user. All people that have an interest in open source and/or UNIX should at least once try to be an OpenBSD user. Many of you will get stuck when you do.
*BSD. A FreeBSD port is at least on the idea state.
OpenBSD has a lot of commercial users but here I have listed a number of special interest to me.
A company, Echothrust Solutions, using OpenBSD for everything from servers to desktop. The company setup is interesting for all of us using OpenBSD.
BSDTalk 151 - OpenBSD used by Frantic Films in many applications.
Loopia Blog - One of the best webhosting companies in Sweden are using BSD OS for most of their services.
RTMX O/S - a product extension to OpenBSD with emphasis on embedded applications. Extentions has been donated back to standard distribution. Soon we a real-time support on OpenBSD! See Solaris Real Time Foundations as comparison.
SemiHalf - Company specializing in porting FreeBSD to embedded architectures e.g. ARM.
Spam Cheetah - Spam filtering solution from India
Profense by ArmorLocic - Firewall product is based on OpenBSD.
NetClean - Based on FreeBSD/Linux
Helion Prime - Russian software development company
Kanebox - Kanebox is a firewall/router/WAP/IPS replacement, running OpenBSD and written in C and Lisp.
BSDLabs - Swedish hosting company
M:Tier - Fortune 500 enterprise customers
pfSense - Firewall appliance based on FreeBSD and OpenBSD pf filter
Genua Secure Laptop uses OpenBSD as firewall.