I've found a list of various governments with their names. Helpful.
http://fantasy.fictionfactor.com/articles/government.html
In the interest of keeping this thread going, how about everyone contributes their favorite resource link? Preferably not large forums or sprawling sites, just single resources that are hard to find.
Here's a site I've always liked:
http://www2.kenyon.edu/AngloSaxonRiddles/texts.htm