Plato
Aristotle
Categories (English and Greek)
De Anima (English and Greek)
De Caelo (English and Greek)
Eudemian Ethics (English; Greek)
Generation of Animals (English and Greek)
History of Animals (English)
Nicomachean Ethics (English; Greek)
On Memory and Recollection (English and Greek)
Physics (English and Greek; English and Greek)
Posterior Analytics (English and Greek)
Topics (English and Greek)
Sophistical Refutations (English and Greek)
Aquinas
Summa Theologiae (English; Latin)
Augustine
Arius Didymus
Fragments (Greek)
Cicero
Academica (English and Latin)
De Finibus (On Ends) (English and Latin)
De Natura Deorum (On the Nature of Gods) (English and Latin)
Epictetus
Enchiridion (English and Greek)
Epicurus
Diogenes Laertius, Lives of Eminent Philosophers, Book X (English and Greek)
Lucretius
De Rerum Natura (DRN) (English; Latin)
Marcus Aurelius
Philodemus
De Musica (Latin)
Plotinus
Enneads (English)
Plutarch
Moralia (English and Greek)
Proclus
Commentary on Plato’s Republic (English)
The Theology of Plato (English)
Pyrrhonian Skepticism (see also Sextus Empiricus)
Diogenes Laertius, Lives of Eminent Philosophers, Book IX (English and Greek)
Seneca
Epistulae Morales (Letters on Ethics) (English, Latin and English)
De Ira (On Anger) (English and Latin)
De Brevitate Vitae (On the Shortness of Life) (English and Latin)
Sextus Empiricus
Outlines of Pyrrhonism (English and Greek)
Against Logicians (English and Greek)
Stobaeus
Anthology (Greek)
Stoicism
Diogenes Laertius, Lives of Eminent Philosophers, Book VII (English and Greek)
SVF (Greek)
Thucydides
History of the Peloponnesian War (English; Greek)
Xenophon
Memorabilia (English and Greek)