Judicial Branch

United States Courts Official Web site of the Federal Judiciary
U.S. Supreme Court
U.S. Supreme Court Decisions from the Legal Information Institute, Cornell University, which includes historic decisions back to the 1800s.
Court Links

U.S. Court of Appeals Decisions
    First Circuit
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    Fourth Circuit
    Fifth Circuit
    Sixth Circuit
    Seventh Circuit
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    Ninth Circuit
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    Eleventh Circuit

Federal Judicial Center (Research and education agency of the federal judicial system)
United States Code