Project Gutenberg provides ebooks of some translations of the Church Fathers in multiple formats for multiple devices.
Prayers of the Early Church. Edited by J. Manning Potts. 1953.
The World’s Great Sermons, Vol. I.—Basil to Calvin. Compiled by Grenville Kleiser. 1908. —Includes one each by Basil, Chrysostom, and Augustine.
Not technically a Church Father, perhaps, but at least as important.
Summa Theologica. Translated by the Fathers of the English Dominican Province.
Part II-II (Secunda Secundae).
On Prayer and the Contemplative Life. By the Very Rev. Hugh Pope. 1914. —Extracts from the Summa.
Declaration of Faith in Latin and the Original Greek.
The City of God. Translated by the Rev. Marcus Dods. 1861.
Confessiones (Oxford edition). 1838.
Confessions. Translated by E. B. Pusey.
King Alfred’s Old English Version of St. Augustine’s Soliloquies Turned into Modern English by Henry Lee Hargrove. 1904.
Writings in Connection with the Donatist Controversy. Translated by the Rev. J. R. King. 1862.
Letters and Treatises. By Charles Lett Feltoe. 1918.
The Apostolic Tradition of Hippolytus. Translated into English with introduction and notes by Burton Scott Easton. 1934.
Leaves from St. John Chrysostom selected and translated by Mary H. Allies. 1889.
St. John Damascrene on Holy Images, followed by Three Sermons on the Assumption. Translated from the original Greek by Mary H. Allies. 1898.