Sources littéraires – Auteurs chrétiens provides a survey of the major collections of patristic texts and part of the Bibliotheca Classica Selecta, “a bibliographic introduction to classical studies.” This site also hosts pages on “Littérature chrétienne grecque et latine” and many related subjects.
NAPS - The North American Patristics Society
Dedicated to the Study of the History & Theology of Early Christianity