(All links will open in a new window.)
Springhole.net: The inspiration for this site! Lots of resources for writers - name generators, etc. The Mary Sue litmus test is excellent.
A New Sith, or Revenge of the Hope: What really happened between Star Wars episodes III and IV? (WARNING: Spoilers!)
List of Things I'm Not Allowed to Do At Hogwarts: Good fun. Some potential spoilers, but nothing major.
Gode Cookery: Ever wondered what people ate in medieval times, when they had food, that is? This site not only tells you, but they have plenty of tasty recipes. (The Medieval Gingerbread is definitely worth a shot.)
Exit Mundi: An exhaustive list of all the ways the world could end. You wouldn't think it'd be so funny, but it is.
The Star Wars Name Generator: What it says.