Origen Bilingual Anthology: These things must happen to each of us mystically, You will find a divine perception & Let our whole life be a life of prayer (in English and Greek side by side)

Ἀνθολογία Ὠριγένη (στὸ πρωτότυπο, χωρὶς μετάφραση)

Origen Full Texts, in English: Against Celsus, On the Principles, Commentary on the Gospel of John, Commentary on the Gospel of Matthew, Letter to Gregory, On Prayer.

An Introduction to Origen

An Introduction to the Commentaries of Origen

Origen in Print

Origen on the Gift of Tongues, an essay by Charles Sullivan

Migne Patrologia Graeca