The US Census TIGER Products are spatial extracts from the Census Bureau's MAF/TIGER database, containing features such as roads, railroads, rivers, as well as legal and statistical geographic areas.
With the Metadata Explorer, you can search, browse, and download data from the FGDL, a mechanism for distributing spatial (GIS) data throughout Florida.
It enables everyone to find, use, and share geographic data and maps. Easily create rich interactive visualizations to solve problems without any experience using traditional mapping tools.
"IPUMS-USA is a project dedicated to collecting and distributing United States census data. Its goals are to: Collect and preserve data and documentation, Harmonize data and Disseminate the data absolutely free!"