Alberti magni opera omnia

Aristoteles latinus database

Brepolis Medieval Encyclopaedias

Cambridge Companions Online

Dictionnaire des philosophes antiques

Encyclopedia of Medieval Philosophy

Encyclopédie Philosophique

History of Women Philosophers

International Encyclopedia of Ethics

International Philosophical Bibliography

Nietzsche Online

Oxford journal Art & Humanities

Past Masters

Philosopher's Index

PhilPapers

The Oxford Companion to Philosophy