Washington and Lee University
"Official" A-to-Z list.
Alphabetical and hierarchical lists. From Louisiana State University.
Subject-searching among Federal Government Web sites.
With links to agencies.
The U.S. National Archives' "captures" (copies) "one-time snapshot of agency public web sites" in an effort to preserve them as historical resources. As of June 2009, this collection includes Federal agencies as of late 2004 and Congressional sites as of 2006 and 2008.
Permanent access to defunct Federal Government agencies and commissions and their publications. Joint project of the U.S. Government Printing Office and the Univesity of North Texas.