The Patrologiae cursus completus, edited by Jacques Paul Migne, is still a major corpus in this field. The Series Latina first appeared between 1844 and 1855, consists of 221 volumes (plus 4 indices) and contains the works of authors starting with Tertullian (ca. A.D. 200) and ending with writers of the thirteenth century. The Series Graeca first appeared between 1857 and 1866, and covers the first century up to 1438, in 161 volumes.
Both series, Latin and Greek, are available online:
Lampe, G.W.H. (Ed). (1961). A Patristic Greek Lexicon. Oxford: The Clarendon Press.
This lexicon represents the final result of a project begun in 1906 under the auspices of the Central Society for Sacred Study when H. B. Swete was Warden and Regis Professor of Divinity at Cambridge. Lampe and his editorial team worked concurrently as Henry Stewart Jones was in the midst of editing the 9th edition of Liddle & Scott. Because Liddle & Scott excluded all post-Biblical Christian authors from its scope, Lampe’s lexicon has since become the essential reference for the study of the vocabulary of many Church Fathers. The design of the lexicon is presented as a companion or supplement to Liddle & Scott. Words that are well attested in the general lexicon and otherwise of less interest for the readers of patristic literature do not receive discussion. Similarly, in order to make space for more vocabulary and lexicographic discussion, common usage of some words is left to Liddle & Scott and Lampe only provides analysis of unusual or unique senses for the patristic authors. Thus, the editors assume that the user of A Patristic Greek Lexicon will have Liddle & Scott also, at their side.
Ivánka, E. (1964). Plato Christianus. Übernahme und Umgestalung des Platonismus durch die Väter. Einsiedeln: Johannes Verlag.