• General &unix; Information
• The X Window System
• Hardware
• Related Operating System Projects

General &unix; Information

• The Unix Reference Desk by Jennifer Myers
• Unix Guru Universe
• O'Reilly & Associates, Inc.
• Unix Power

The X Window System

• The X.Org and XFree86™ projects provide users of a variety of Intel based &unix; systems, including FreeBSD, with an excellent X Window system.
• The WINE project is working to provide the ability to run Microsoft Windows® software on Intel based UNIX systems such as FreeBSD, NetBSD and Linux.

Hardware

• The comp.answers pc-hardware-faq is a great reference for people building their own machines.
• Intel Secrets -- What Intel Doesn't Want You To Know - lots of information about Intel chips.
• Aad Offerman's Chip List - reference material on chips used in PC clones.

Related Operating System Projects

• NetBSD is another free 4.4BSD Lite based operating system which runs on several different architectures.
• OpenBSD is another 4.4BSD derivative with focus on security.
• Linux is another free &unix; like system.
• Darwin is the free system that forms the core of Apple's Mac OS X system.
• Lites is a 4.4BSD Lite based server and emulation library that provides free &unix; functionality to a Mach based system.
• The GNU Hurd project is another effort to develop a free &unix; like operating system.
• DragonFly BSD is based on FreeBSD 4.X but has a different set of development goals than FreeBSD 5.X.
• OpenSolaris is the open source variation of Sun Microsystems' Solaris operating system, which is also a BSD derivative and was called SunOS. The most part of the codebase has been opened, but the whole operating system is still being distributed in the old way, too.