The White House (http://www.whitehouse.gov)
Use for current Presidential news, events, addresses, policies, appointees and more. The site includes biographical information on the president, First Lady and Vice President. The site also includes current blogs, the weekly Presidential address, Executive Orders, and Proclamations. Historical information is also available under the "About the White House" tab. The "Our Government" tab explains how federal, state and local governments work.
Library of Congress (http://www.loc.gov/rr/news/fedgov.html)
The Library of Congress presents an organized list of links to the President's Office and official U.S. Executive Office departments, agencies and bureaus. Includes links to independent agencies and committees.
Firstgov(http://www.usa.gov)
This is the US government's official website for citizen and business information, services and resources. Link to all branches of government, all agencies using the A to Z agency index, an alpha index to tribal governments, answers to frequently asked questions, population and economic data, and more. The site contains consumer guides, governmental forms and a a section to help you replace vital records, shop government auctions and apply for government jobs.
U.S. Government Printing Office (http://www.gpoaccess.gov)
The GPO provides free access to full text information and documents from the three branches of federal government. Databases include Presidential documents and public papers from 1991 forward, the Code of Federal Regulations from 1996 on. Go to http://www.gpoaccess.gov/coredocs.html for the Articles of Confederation, the U.S. Government Manual, and much more. Use the A - Z Resource List to quickly link to official information available from the federal government.
GPO Access (http://www.access.gpo.gov/su_docs)
From this U.S. Government Printing Office site, search the full text of the Code of Federal Regulations (from 1996- ) and the Federal Register (from 1994- ), by agency, search terms or citation. Through the http://www.regulations.gov link, review and submit comments on proposed regulations.