Online books

Theology & Spirituality

• Confession: The Healing Sacrament by Jim Forest
• The Way of the Ascetics by Tito Colliander
• Some Aspects of Orthodox Theology, from Holy Trinity Monastery (Jordanville, New York) (1958)

History

• Orthodox Christians in North America 1794-1994
• The Truth About the Russian Church Abroad, by M. Rodzianko

Pastoral issues

• The Basis On Which Economy May Be Used In The Reception Of Converts, by Metr. Anthony (Khrapovitsky) of Kiev
• Orthodox Christian Education of Children in our Days, by Protopresbyter G. Grabbe (1960)
• The Rudder, a.k.a. The Pedalion (includes only the text of the canons, not the commentary by St. Nikodemos)

Catechism

• The Orthodox Faith (4 volume "Rainbow Series" Catechism) by Fr. Thomas Hopko
• The Orthodox Church by Bishop Kallistos (Ware) of Diokleia

Collections

• Bibliotheca Orthodoxa IntraText (in many languages)
• Bibliotheca Patristica IntraText (in many languages)
• Christian Classics Ethereal Library
• Library of Books, Articles and Links on Hesychasm