The National Center for State Courts (NCSC) lists judicial branch website information for each state, focusing on the administrative office of the courts, the court of last resort, any intermediate appellate courts, and each trial court level.
Judicial Branch Overviews
Judicial Agencies (USA.gov)
The Federal Judiciary (UScourts.gov)
The OYEZ Project provides access to more than 2000 hours of Supreme Court audio. All audio in the Court recorded since 1995 is included in the project. Before 1995, the audio collection is selective.