Free Databases of U.S. Law Cases
Contains official authorised opinions from 1991 - present (click on 'Bound Volumes' link for older decisions).
A multimedia archive devoted to the Supreme Court of the United States and its work, including decisions from 1792. You can also view cases by issue (subject matter).
FindLaw's Cases and Codes database contains resources and links for both state and federal laws, including opinions from the Supreme Court, Federal Appellate Courts, Federal District and Trial Courts, and links to state law cases. Search by case summaries or select a jurisdiction to browse applicable laws.
Hosted by Cornell University Law School, this site has the opinions of the United States Supreme Court handed down since 1992, together with over 600 historically important earlier decisions, over a decade of opinions of the New York Court of Appeals, and the full United States Code. It also publishes important secondary sources.