Apple Computer Inc. - Great computers. Period.
The MacPac - The best Apple Computer Service and Support in the nortwestern United States...Oh yeah....they sell them too.
VersionTracker - Great place to find free/shareware, and updates for a variety of computing platforms (including the Macintosh).
MacFixIt - A good troubleshooting reference for the Macintosh platform.
MacUpdate - Great place to find Macintosh only free/shareware, plus, they post my software updates almost automatically.
MacWorld - I used to love to read Guy Kawasaki's articles...Thankfully, the've mentioned my software.
Ubuntu - Good place to get a handle on using PC's without Window$.
Mount Hood Community College - Good place to learn.
Portland State University - Another good place to learn.
Memtest|OSX - Free Mac OS X command line memory (RAM) test program. I make a GUI wrapper for this (available here)
SoftPedia gives my software cool ratings like "100% Free!" or "100% Clean". That's alright by me.
GNU Project