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The SDF Public Access UNIX System

Traveler13 - just an old geriatric geek getting back into open source

OpenBSD
The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system.
Only two remote holes in the default install, in a heck of a long time!

OpenBSD Journal
We are constantly on the lookout for stories of how you put OpenBSD to work.

FreeBSD
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms.

NetBSD
NetBSD is a free, fast, secure, and highly portable Unix-like Open Source operating system.

DragonFlyBSD
DragonFly provides an opportunity for the BSD base to grow in an entirely different direction from the one taken in the FreeBSD, NetBSD, and OpenBSD series.

GhostBSD
A simple, elegant desktop BSD Operating System

NomadBSD
NomadBSD is a 64-bit live system for USB flash drives, based on FreeBSD.

DistroWatch
DistroWatch is a website which provides news, distribution pages hit rankings, and other general information about various Linux distributions as well as other free software/open source Unix-like operating systems.

Clonezilla
Clonezilla is a partition and disk imaging/cloning program. It helps you to do system deployment, bare metal backup and recovery.

ProtonMail
Secure Email Based in Switzerland. Secure Your Communications With ProtonMail.

Tutanota
Secure email for everybody. Tutanota is the world's most secure email service, easy t o use and private by design.