World of Warcraft
Links concerning World of Warcraft in general are sorted in this category.
Allakhazam
A very good site with detailed information on everything found in WoW!
Thottbot
One of the best sites to look up Information about nearly anything in WoW!
World of War
A very useful page with a lot of Information abot World or Warcraft. The ideal site if you want to start a new Character and need to look up some facts.
WoWwiki
A very good site with detailed information about Races, Classes as well as instances and professions. If you want to know something about WoW you will probably find it here.