Adobe Reader
http://www.adobe.com
Antivirus/Antispyware for Macs (perhaps necessary someday down the road...)
Mac OS X anti-virus software: More trouble than it's worth?
http://edu-observatory.org/olli/hcs/index.html (Home Computer Security)
http://www.securemac.com/ (Macintosh security and Mac OS X Security)
http://macscan.securemac.com/ (antispyware)
http://free.avg.com/download-file-ins-afg-free. Free AVG for PCs
Apple
http://www.apple.com
AppleJack
http://www.macupdate.com/download.php/15667/AppleJack-1.6.dmg
AppleNews
Apple
AppleInsider
MacFixIt
MacOSX_Hints
MacObserver
MacRumors
MacWorld
OSXdaily
SlashDot_Apple
ars technia
Apple Software & Support, etc.
http://developer.apple.com/opensource/tools/
http://developer.apple.com/opensource/tools/runningx11.html
http://osxhelp.com/
http://safari.oreilly.com/0596006063/macpantherian-CHP-10-SECT-5
http://support.apple.com/kb/HT1343 (Boot Options)
http://support.apple.com/kb/index?page=search&locale=en_US&q=
http://support.apple.com/manuals
http://www.ifixit.com/
http://web.ipac.caltech.edu/staff/hoard/mactips/MacOSX_configuration_tips.html
http://www.apple.com/downloads/
http://www.apple.com/macbook/the-new-macbook/watch.html#large
http://www.apple.com/sitemap/
http://www.apple.com/support/
http://www.apple.com/support/downloads/
http://www.apple.com/support/find/
http://www.apple.com/support/manuals/
http://www.apple.com/support/snowleopard/
http://www.dsg.port.ac.uk/~eme/mac.html Astrophysics Stuff
http://www.macupdate.com/
http://www.macworld.com/
http://www.macworld.com/search.html?cx=003198751674731024891%3Aovffo1orlum&q=maintenance&sa=search&client=idg-cse&cof=FORID%3A11
http://www.osxfaq.com
http://www.osxfaq.com/Tutorials/
http://www.westwind.com/reference/OS-X/commandline/single-user.html
Command Line
http://www.westwind.com/reference/OS-X/commandline/
http://www.commandlinefu.com
http://www.osxfaq.com/tips/unix-tricks/
http://www.kernelthread.com/mac/osx/tools.html (old)
http://www.osxfaq.com/tips/unix-tricks/week104/wednesday.ws
sw_vers
system_profiler
http://www.osxfaq.com/tips/unix-tricks/week18/wednesday.ws
softwareupdate
DiskWarrior, etc.
http://www.alsoft.com/DiskWarrior/
http://reviews.cnet.com/8301-13727_7-10422139-263.html?tag=mncol;title
GIMP (Open Source similar to PhotoShop®)
http://gimp.org/
Iowa State
http://tech.its.iastate.edu/macosx/macosx-10.6.shtml
iPad/iPhone/iPod Apps (Reviews)
http://www.appstoreapps.com/most-popular-apps/
Mac Ads
http://movies.apple.com/ca/getamac/ads/
http://en.wikipedia.org/wiki/Get_a_Mac
http://pastie.org/602001.txt
http://adweek.blogs.com/adfreak/get-a-mac-the-complete-campaign.html
Mac Confguration Tips
http://spider.ipac.caltech.edu/staff/hoard/pages/MacOSX_configuration_tips.html
MacUpdate
http://www.macupdate.com/
http://www.macupdate.com/about/
Mozilla Firefox and Thunderbird (alternative brower and alternative mail client)
http://www.mozilla.org/products/
http://www.apple.com/downloads/macosx/internet_utilities/mozillafirefox.html
Open Office (Open Source version of office suite)
http://www.openoffice.org/
http://www.tutorialsforopenoffice.org/category_index/wordprocessing.html
Open-source DNS Benchmark Utility
http://code.google.com/p/namebench/
Opera (alternative brouser)
http://www.opera.com/download/index.dml?platform=mac
Parallels (virtualization software - multiple operating systems)
http://www.parallels.com/en/
Ramjet (Mac Memory)
http://www.ramjet.com/
http://ramjet.com/imacflat.asp
RealPlayer (Media Player)
http://www.apple.com/downloads/macosx/internet_utilities/realplayer.html
Show My PC (Remote Access)
http://showmypc.com/
Simple Help
http://www.simplehelp.net/
Unix Tools (DMGs, Pkgs, etc.)
http://sial.org/howto/shell/
http://sourceforge.net/project/showfiles.php?group_id=146701
http://www.macports.org/
http://guide.macports.org/
http://xquartz.macosforge.org/trac/wiki/X112.3.1
http://www.macupdate.com/info.php/id/26593/xquartz
http://www.cs.cmu.edu/~benhdj/Mac/unix.html
http://www.osxfaq.com/Tutorials/LearningCenter/index.ws
http://moab.eecs.wsu.edu/~schneidj/mac-os-x-10.3.html
Windows Media Player (Media Player)
http://www.apple.com/downloads/macosx/video/windowsmediaplayerformacosx.html
WireTap Pro/Studio (If you can hear it... you can record it)
http://www.ambrosiasw.com/utilities/wiretap/
XV is a powerful image viewer/editor widely used in the Unix world
http://homepage.mac.com/eric.lee/xv/