Catalog of U.S. Government Publications. The CGP is the finding tool for electronic and print publications from the legislative, executive, and judicial branches of the U.S. government.
FDsys. Offers digital access to government information by Congress and Federal agencies. A service of the U.S. Government Printing Office.
Regulations.gov. Read and post comments to new regulations proposed by Federal agencies.
Science.gov. Federal gateway for science information. Browse by topic or search.
U.S. Government Documents Ready Reference Collection. Organizes census and other federal government data by topics, then by publication title.
USA.gov. Search this site for information on a wide variety of topics.