EconData (INFORUM)
This site contains numerous databases with several hundred thousand series collected from a variety of
U.S. government agencies by Inforum, a project that does research
and consulting with macroeconomic interindustry models. EconData
contains a wide variety of macro data, regional, and international
data that are provided in a standardized, easy to use format. The G
program is used to open the databases, but data can be exported for
use with other software.
http://www.inforum.umd.edu/econdata/econdata.html