J. P. Migne's monumental collection of the Latin Fathers -- 221 volumes! has found its way online, but as far as I know has not yet been translated entirely into English. However, many of the works in Migne have appeared in English translation -- even if in some cases the translation may not be from a Latin base that exactly matches Migne's Text.
A while back, in a fit of enthusiasm for Migne, I started, as an exercise, go through the first few volumes of Migne and see if I could find English translations for all the Latin works. The result was the chart below, which perhaps I will expand at some point.
In the chart below, PL refers to Patrologia Latina, to "PL 1:258" would refer to Migne's PL, volume 1, page 258. ANF refers to Schaff's Ante-Nicene Fathers.
| Work as found in Migne | Work in English translation |
|---|---|
| Tertulliani | Tertullian |
| Apologeticus Adversus Gentes (PL 1:258) | The Apology, ANF III |
| Ad Nationis libri duo (PL1) | Ad Nationes, Book II, ANF III |
| De Testimonio Animae liber adversus gentes (PL 1) | The Soul’s Testimony, ANF III |
| Liber ad Martyres (PL 1) | Ad Martyras, ANF III |
| Liber de Spectaculis (PL 1) | The Shows, or De Spectaculis, ANF III |
| Liber de Idolatria (PL 1) | On Idolatry, ANF III |
| Liber ad Scapulam (PL 1) | To Scapula, ANF III |
| Liber de Oratione (PL 1) | On Prayer, ANF III |
| Liber de Baptismo (PL 1) | On Baptism, ANF III |
| Liber de Poenetentia (PL 1) | On Repentance, ANF III |
| Liber de Patientia (PL 1) | On Patience, ANF III |
| Libri ad Uxorem duo (PL 1) | To His Wife, Books I & II, ANF IV |
| Libri de Cultu foeminarum duo (PL 1) | On the Apparel of Women, Books I & II, ANF IV |
| Liber de Praescriptionibus adversus hereticos (PL 2) | The Prescription Against Heretics, ANF III |
| De Corona militis (PL 2) | The Chaplet, or De Corona, ANF III |
| De Fuga in persecutione (PL 2) | De Fuga in Persecutione, ANF IV |
| Adversus Gnosticos Scorpiace (PL 2) | Scorpiace, ANF III |
| Adversus Praxeam (PL 2) | Against Praxeas, ANF III |
| Adversus Hermogenem (PL 2) | Against Hermogenes, ANF III |
| Adversus Marcionem libri quinque (PL 2) | The Five Books Against Marcion, ANF III |
| Adversus Valentinianos (PL 2) | Against the Valentinians, ANF III |
| Adversus Judaeos (PL 2) | An Answer to the Jews, ANF III |
| De Anima adversus philosophos (PL 2) | A Treatise on the Soul, ANF III |
| De Carne Christi (PL 2) | On the Flesh of Christ, ANF III |
| De Resurrectione carnis (PL 2) | On the Resurrection of the Flesh, ANF III (p. 545) |
| De velandis Virginibus (PL 2) | On the Veiling of Virgins, ANF IV |
| De Exhortatione Casitatis (PL 2) | On Exhortation to Chastity, ANF IV |
| De Monogamia (PL 2) | On Monogamy, ANF IV |
| De Jejuniis (PL 2) | On Fasting, ANF IV |
| De Pudicitia (PL 2) | On Modesty, ANF IV |
| De Pallio (PL 2) | On the Pallium, ANF IV |
| Carmina Terulliano Adscripta | Poems Sometimes Associated with Tertullian |
| Adversus Marcionem libri V. (PL 2) | Five Books in Reply to Marcion, ANF IV |
| Genesis (PL 2) | Genesis, ANF IV |
| Sodoma (PL 2) | A strain of Sodom, ANF IV |
| Ad Senatorem (PL 2) | Poem to a Senator converted from Christianity to the service of idols, translated by Brian Croke, in Religious Conflict in Ancient Rome, online on Roger Pearse’s blog. |
| De Jona et Ninive (PL 2) | A Strain of Jonah the Prophet, ANF IV |
| De Ligno vitae (PL 2) | The tree of life, translated by Carolinne White, shared online by Roger Pearse. |
| Fragmentum de execrandis Diis, a bibliotheca Vaticana erntum a Joh. Mar. Suaresio Avenionensi (PL 2) | A Fragment Concerning the Execrable Gods of the Heathen, ANF III |
| PL 3, Anonymous | |
| Fragmentum acephalum de canone SS. Scripturarum (PL 3:181) | The Muratorian Canon, ANF V, online here |
| PL 3, Marcus Minucius Felix | |
| Marci Minucci Felicis OCTAVIUS, cum notis variorum (PL 3:239) | Octavius, Marcus Minucius, at New Advent |
| PL 3, Anonymous | |
| Chronicon sub Alexandro Severo scriptum (PL 3:671) | The Chronicon of Hippolytus*, translated by Thomas Coffman Schmidt and Nick Nicholas, found on archive.org.[1] |
| PL 3, Various Epistles | |
| Epistola Prima: S. Cypriani Carthaginensis Episcopi ad S. Cornelium Papam (PL 3:699) | Epistle 40, at New Advent. |
| Epistola II: S. Cypriani Carthaginensis Episcopi ad S. Cornelium Papam (PL 3:702). | Epistle 41, at New Advent. |
| Epistola III: Ejusdem ad Eumdem (PL 3:708) | Epistle 42, ANF V, as found at New Advent. |
| Epistola IV: Ejusdem ad Eumdem (PL 3:709) | Epistle 44, ANF V, as found at Sacred Texts. |
| Epistola V: Cornelius Cypriano Fratri Salutem (PL 3:712) | Epistle 47, ANF V, as found at New Advent. |
| Epistola VI: Sancti Cornelii Papae ad Cyprianum Carthaginensem Episcopum (PL 3:715) | Epistle 45, ANF V, as found at New Advent. |
| Epistola VII: S. Cypriani, Carthagensis Episcopi, ad Cornelium Papam (PL 3:725) | Epistle 48, ANF V, as found at New Advent. |
| Epistola VIII: S. Cypriani Carthagensis Episcopi ad Cornelium Papam (PL 3:731) | Epistle 46, ANF V, as found at New Advent. |
| IX ex Epistola: Ad Fabium Antiochenum Episcopum Fragmenta, or, Cornelii Papae Epist. IX. Ad Fabium | Eusebius, Church History, Book VI, Chapter 43, Paragraph 5, as found at New Advent. |
| Epistola X: Seu Epistolae S. Cypriani ad Antonianum Prima Pars, in qua Cyprianus de S. Cornelio Disserit | Epistle 51, ANF V, as found at New Advent. |
| Epistola XII: S. Cypriani Carthaginensis Episcopi ad S. Cornelium Papam (PL 3:796) | Epistle 54, ANF V, as found at New Advent. |
| PL 3, Epistolae Cornelio Adscriptae | |
| Epistola I: Cornelius Episcopus Fratri Lupicino Viennensi Archiepiscopo Salutem (PL 3:839). | I have not been able to find a full translation online,[2] so I made my own.[3] |