N. S. Gill's Ancient / Classical History announces:
Early Christianity Glossary
It's clearly still in development, but could be another useful glossary in the long term (cf. Deinde's stronger one, and my recent blog comments on other on-line glossaries). I'd have liked to have seen some comment on the use of "A.D." and "B.C." here, at least some acknowledgement that they are not now used by many scholars. But this makes me wonder something out loud. Is there anyone apart from Biblical scholars / theologians using BCE / CE? It's been out there a long time now. Is it ever going to catch on more broadly?
Update (23.18): N. S. Gill emails to note that she has now added sentences on "B.C.E." and "C.E."