A Century of Lawmaking for a New Nation: United States Congressional documents and debates from 1774-1873.
Congress.Org: News, information and resources on Congress including votes, bills, assignments and information about individual members.
Congressional Archives: Several on-line exhibits from the Carl Albert Center on various Congressmen. Contains educational background information on their Collections.
Congressional Observer Publications: C.O.P. provides accurate, timely, meaningful, and absolutely non-partisan coverage of every vote in the House and Senate. Also contains some historic information and studies on Congressional voting.
CongressLink: Know your Congress: A site that educates about Congress, the Constitution, the legislative process (long and short versions), current Congressional leadership, and Congressional staff positions.
House of Representatives Historical Highlights: Profile, membership, and leadership information from the 1st through the present Congres. Also virtual tours and special exhibits.
Joint Committee on The Organization of Congress -- Final Report: Organization of the Congress (1993)
Joint Committee on The Organization of Congress -- Recommendations: Recommendations from the Joint Committee House members on how to make Congress more effective, accountable, and credible.