Please note that this list of resources is not exhaustive.

International Court of Justice (World Court)
Home page, decisions, list of pending cases and background information and documents.
International Tribunal for the Former Yugoslavia
Tribunal cases; Basic documents; Press releases.
International Criminal Tribunal for Rwanda
Decisions, documents, rules of procedure.
International Criminal Court
Official U.N. site; Documents on establishment of court; Material from Rome Conference.
Coalition for an International Criminal Court (CICC)
Primary non-governmental organization to monitor creation of an international criminal court; Documents and other types of information.
European Court of Justice
Includes case-law of the Court and the Court of First Instance, texts of proceedings, notes for guidance of counselor.
European Court of Human Rights 
General Information, Basic Tests, Judgments.
Inter-American Court of  Human Rights.
Official site. Includes opinions, and other publications. Some material in Spanish only.