NBER disseminates data from its sponsored research projects on the macro economy, international trade, labor economics, patents, and various other areas.
Edited by Bill Goffe, this guide is one of the oldest and best around, sponsored by the American Economic Association. It lists 2,100 resources in 97 sections and sub-sections available on the Internet of interest to academic and practicing economists, and those interested in economics.
The (IPUMS) consists of thirty-eight high-precision samples of the American population drawn from all fifteen surviving federal censuses from 1850-2000, collectively the richest source of quantitative information on long-term changes in the American population.