- Anastasis
- Bibliotheca Augustana
- Byzantine Monastic Foundation Documents
- Centrte for Patristic Publications
- Christian Classics Ethereal Library (Calvin College)
- Crosswalk
- Early Church Fathers
- Franz Joseph Dölger-Institut
- Internet Christian Library
- La Bibliotheque du Cerf
- LOGOS, the Orthodox Bookstore
- Myriobiblos
- New Advent
- St Pachomius
- Suda On Line
- The Bibliographic Information Base in Patristics, Université Laval (French)
- The Ecole Initiative
