Patrologia Latina http://pld.chadwyck.com/
Patrologia Graeca http://patristica.net/graeca/
Also see Patrologia Graeca https://www.roger-pearse.com/weblog/patrologia-graeca-pg-pdfs/
Brandel LIbrary does not have a subscription to the full Thesaurus Linguae Graecae (TLG), but certain portions of are open access:
TLG Canon http://stephanus.tlg.uci.edu/Iris/canon/csearch.jsp
Abridged TLG http://stephanus.tlg.uci.edu/Iris/demo/csearch.jsp
Lexica http://stephanus.tlg.uci.edu/lexica.php
