Congress 

• Biographical Dictionary of the U.S. Congress
  "The Directory provides biographical, archival, and bibliographical information for current and former senators, as well as representatives, vice presidents, and members of the Continental Congress."
• C-Span: Congress
  News, schedules, directory, legislation guide, glossary, and more.
• CapitolHearings.org
  Live streaming audio of Senate committee hearings as they occur.
• Congress.org
  Tracks current bills, issues, and legislation. Includes form which allows you to enter your zip code to see a description of local, state, and national officials.
• Congress Votes Database
  "This site lets you browse every vote in the U.S. Congress since 1991."
• Congressional Pictorial Directory
  "Provides a color photograph of each member of the House of Representatives and the Senate. It also includes information about a Member of Congress' length of service, political party affiliations, and Congressional district. Also contains pictures of the President, Vice President, and House and Senate officers and officials."
• Congresspedia
  A " 'citizen's encyclopedia on Congress' that anyone—including you—can edit. Congresspedia is a not-for-profit, collaborative project of the Center for Media and Democracy and the Sunlight Foundation and is overseen by an editor to help ensure fairness and accuracy."
• GovTrack.us
  "GovTrack.us is a nexus of information about the United States Congress, bringing together information on the status of federal legislation, voting records, and campaign contributions. The site automatically tracks legislative events and categorizes them into thousands of subjects ... so that users can subscribe to follow just the events that interest them."
• OpenCongress.org
  "OpenCongress brings together official government data with news and blog coverage to give you the real story behind each bill." Includes forums and customizable interface with links to favorite areas.
• Thomas - U.S. Congress on the Net
  Text of legislation, reports, the Congression Record, votes, links to House and Senate websites, historical documents, directories, and more.
• U.S. House of Representatives
  U.S. House homepage. Includes schedules, committees, contact information, history, and information about how the House works.
• U.S. Senate
  U.S. Senate homepage.  Includes schedules, committees, contact information, history, and information about how the Senate works.
• U.S. Senate: Virtual Reference Desk
  "If you are seeking general information on the Senate, the legislative branch and process, or on the federal government, this is a good place to begin. Links are arranged broadly by subject and may take you to PDF documents, useful sources on the Web, or other Senate Web pages."
• Voterwatch
  "The Congressional Record doesn't necessarily reflect what's said on the floor. Our elected officials can edit and insert and remove entire speeches at will. ... Voterwatch helps you watch them. What they say. When they say it. What they're wearing. We've got it all, and we're not afraid to give it to you."