National Archive of Criminal Justice Data National Archive of Criminal Justice Data which is affiliated with the Bureau of Justice Statistics. Don't try to use this data on deadline. Site generally sucks. The IRS Statistics of Income program tracks all sorts of data but always in summary form. All are downloadble often in spreadsheet form.
Some databases are VERY big and the site is VERY slow.
Federal Railroad Administration Accident Data Gone is the old gopher site but this web page still lets you download files in DBF format. Includes good record layouts. You'll have to worl your way through the menu but the actual data can be found in a pull-down menu . This NOAA site includes a nice archive with downloadable files on tornadoes and tornado deaths since 1950 . There's also data on hail and wind damage data.