V. Private International Law
The best search option in international law is via the catalog of the Max Planck Institute for Comparative Public Law and International Law, which, however, offers literature references and no full texts, and the Westlaw full-text search.
Podcasts
UN Audiovisual Library (free)
Jus cogens: The international law podcast (Uni Leiden) (free)
Declarations - The Human Rights Podcast (Cambridge) (free)
Oxford Public International Law Discussion Group Podcast Part I, Part II, Part III (free)
EJIL: The Podcast (free)
Better Human Podcast (free)
International Law Mooc der UCL von Pierre d'Argent (free)
Völkerrechtspodcast (free)
UNrecht - ein Podcast zum Einstieg in das Völkerrecht (free)
ECHR
Grabenwarter/Pabel, EMRK Kommentar
Karpenstein/Mayer, EMRK Kommentar
Krennerich, Menschenechtspolitik UTB
Meyer-Ladewig/Nettesheim/von Raumer, EMRK Kommentar
General Public International Law
Max Planck Encyclopedia of Public International Law
Dahm/Delbrück/Wolfrum, Völkerrecht Bd. I/1, Die Grundlagen. Die Völkerrechtssubjekte
Hobe, Einführung in das Völkerrecht UTB
von Arnauld, Klausurenkurs im Völkerrecht
Special Areas
Ambos, Internationales Strafrecht
Gareis/Varwick, Die Vereinten Nationen UTB
Herdegen, Internationales Wirtschaftsrecht
Schieder et al., Theorien der Internationalen Beziehungen UTB
Wesel, Internationale Regime und Organisationen UTB
Basic Magazines
American Journal of International Law (1907-2019, 2020-aktuell)
Archiv des Völkerrechts (1948-2017, 2002-aktuell)
ASIL Insights (free)
European Journal of International Law
Goettingen Journal of International Law (free)
Humanitäres Völkerrecht: Informationsschriften (free)
International Legal Materials (ab 2012, bis 2012)
International Review of the Red Cross (free)
Leiden Journal of International Law
Zeitschrift für Ausländisches Öffentliches Recht und Völkerrecht
Continuous Magazines
Asian Journal of International Law
American University International Law Review (free)
Australian Journal of Human Rights (free)
Australian Yearbook of International Law (free)
Berkeley Journal of International Law (free)
Boston University International Law Journal (free)
British Yearbook of International Law
California Western International Law Journal (free)
Canadian Yearbook of International Law
Cardozo Journal of International and Comparative Law (free)
Case Western Reserve Journal of International Law (free)
Chicago Kent Journal of International and Comparative Law (free)
Chinese Journal of International Law
The Connecticut Journal of International Law (free)
Cornell International Law Journal (free)
Emory International Law Review (free)
Ethics International Affairs Journal
Fordham International Law Journal (free)
Harvard Law School Human Rights Journal
Human Rights Review (free)
Indian Journal of International Law
International Journal of Refugee Law
International Journal of Transitional Justice
International Theory: A Journal of International Politics, Law and Philosophy
Journal of Human Rights Practice
Journal of International Human Rights (free)
Journal of International Law & International Relations (free)
Journal of the History of International Law
Law and Ethics of Human Rights
Michigan Journal of International Law (free)
Netherlands International Law Review
Netherlands Yearbook of International Law
Nordic Journal of International Law
Virginia Journal of International Law (free)
Yale Journal of International Law (free)