James Grout's Encyclopaedia Romana has been online since April 1997, using densely linked essays to wander through Roman history, architecture, religion, food, Britain, Greece, Byzantium, and whatever historical side road proved interesting enough to follow.
RomanMilitary.net has organized Roman army history since the late 1990s around weapons, armor, siege engines, forts, formations, tactics, soldier life, historical figures, quizzes, essay questions, and teacher resources.
MythNET began as a 1997 Ontario student classics project and still preserves pages on Olympian gods, major heroes, genealogical charts, myths, folklore, Roman life, and Latin vocabulary inside the larger Classics Unveiled site.
WebWinds preserves late-1990s chat transcripts, reading notes, translations, and mythology resources built around Ovid's Metamorphoses and the now-defunct Ancient Sites community.
Bernard Suzanne's Plato and His Dialogues has been online since 1996, combining chronology, maps, indexes, translations and a personal theory about how Plato's works fit together.