BestPlaces.net
A great portal for discovering the "best" places to live in the U.S.A. Discover data about crime, school, climate, cost-of-living, and more!

Best Places to Live
From Money magazine, a ranking of the best cities to live in.

City Comparison
This Yahoo site provides in-depth comparisons between cities (and not metro areas). Discover climate, tax, crime, real estate, economic, and other information for major cities around the U.S.A.

MoversGuide
A plethora of moving (and change-of-address) information from the United States Postal Service.

Salary Calculator
A great resource to help you compare the general cost of living between two cities. First, select the "from" and "to" states and then you'll be able to select cities.