United States Constitution
United States Code
BETA: Federal Opinions Access, 2004 to current, (a pilot project of select Federal Courts, with text-searchable cases arranged by original case number).
The Oyez Project
A multimedia archive devoted to the Supreme Court and its work. The site includes oral transcripts and briefs for Supreme Court cases from 1793–present and offers visual tours of the Supreme Court building, including views of the chambers of some of the Justices.
Congress.gov - Official website for U.S. Federal Legislative Information
FDsys - Federal Digital System from the Government Printing Office: Access the Congressional Record, Congressional Hearings and Committee Reports, the Federal Register, and more documents from every branch of the Federal government.
Federal Legislative History