Supreme Court Collection
From the Legal Information Institute. Includes text of decisions since 1990 and a full text collection of the "most important historical decisions." A court calendar, oral argument schedule and links to other informative sources are also available.

Supreme Court Cases
Access several databases that include full text Supreme Court decisions.

Oyez Project
From Northwestern University. "Provides abstracts and other materials for leading cases in constitutional law." Select "Cases" link and search by title, citation, subjects or date. Many of the Decisions are avialable in RealAudio.

FindLaw
Source of data for Law research. Text of Supreme Court Decisions since 1893.