Slackware
This is the main page of my favorite Linux distribution.
The Revised Slackware Book Project
Here you can download the complete Revised Slackware Book (v2) in PDF or read it on-line. A newer version is in the making (v3) but the current is still a valuable reference for installing and configuring Slackware.
LinuxQuestions.org Slackware Forum
I hang out here a lot. It is the the place to ask questions and find answers about anything related to Slackware.
Here you can download "slackbuild-scripts" to create Slackware packages. These can then be installed on your system with the standard package tools.
Robby is a member of the Slackware team and maintains some nice 'non-official' packages for Slackware, like OpenOffice, which can be downloaded from his site.
A Wiki site with lots of interesting information, maintained by Eric Hameleers, AKA "Alien BOB", another member of the Slackware team. Eric also maintains some very useful scripts. Just follow the links on the main Wiki page!
For those interested in running Slackware on a mainframe (or the Hercules emulator, like I do), this page is the source for the official S/390 port of Slackware.
Another Slackware port, this one for the ARM processor. You can download a version for the SheevaPlug and the QEMU emulator.
Emulation & Virtualization
Qemu Open Source Processor Emulator
Qemu is both an emulator and a solution for virtualization of systems. I use it to run different versions of Slackware and different distributions of Linux and even some Windows versions. It is completely configurable from the command prompt.
VirtualBox is another open source solution to create Virtual Machines under Linux or Windows hosts. The guests can be a variety of operating systems. There are also commercial versions available.
Hercules is an open source System/370, ESA/390 and z/Architecture emulator. I use it to run Slack/390 on top of my Slackware box, but there are also versions available for Windows. If you have experience with mainframes, you can install z/OS as well, but you will need a special developers license for this to be a legal setup.
xtrs TRS-80 Model I, III, 4 and 4p emulator
xtrs is an open source emulator for the Tandy / Radio Shack TRS-80 Models I, III, 4 and 4p for X Windows systems. It is distributed in source format, but you can also download my Slackware packages here.
Lego
The Official Web Site of LEGO ©
I guess this one needs no introduction :)
Lately I haven't had too much time to spend with my LEGO collection, but I still am a big fan. My member page on LUGNet can be found here.
For those who do not have that many Lego pieces, you can build without limitations using one of the LDraw CAD programs.
LeoCAD is a wonderful program to create your Lego constructions virtually on your computer. A package for Slackware is available here on my site.
The Persistence of Vision Raytracer
And after finishing your structure, ray-trace the result with POV-Ray to create astonishing images!
National Geographic
The National Geographic Society is the organization behind the magazine.
The site of the National Geographic Magazine.
Blogs I read
My own personal blog, with random thoughts and tips & tricks for Slackware.
My wife's personal blog, in Portuguese.
Other links
TORNI-ARTE Indústria Metalúrgica
This is the page of my brother-in-law's company. I helped him out setting up this site on a Linux server. As you can see the design is quite familiar...
This is the company I work for.