(a) Translations of the Corpus Platonicum

Jowett's translations of Plato's dialogues, now in the public domain,
are accessible via MIT

L. Rossetti's translation of Plato's Euthyphro into Italian with glossary (forthcoming)

(b) Bibliography

Plato Bibliography

The Platonic Textual Tradition: A Bibliography

(c) Introductory pages, images, interpretation

Hearst Museum's Plato (requires Flash)

David James Parsons, Algorythmythica, Act II: In Plato's Cave

Bernard Suzanne, Plato and his Dialogues in French and English

(d) Other sites of interest in Plato studies

John Traill, Athenians

Internet Encyclopedia of Philosophy

Peter J. King, Philosophy around the Web (Oxford, U.K.)

Lexicon of Greek Personal Names

Philosophy Documentation Center

Servizio Web Italiano per la Filosofia (SWIF)

Société d’Études platoniciennes

Socratica

Stanford Encyclopedia of Philosophy

from the Università di Bologna

Zeitschrift fuer Papyrologie und Epigraphik

(e) Societies

American Philological Association

American Philosophical Association

Ancient Philosophy Society

Dublin Centre for the Study of the Platonic Tradition

Society for Ancient Greek Philosophy