Tony Burke’s blog on everything regarding early Christian apocrypha.
April Deconick’s blog on early Christianity, apocrypha, and Gnosticism (formerly The Forbidden Gospels).
Brice C. Jones
A blog on Early Christianity, focusing on papyrology and manuscripts. His website also has links to collections of papyri on the web.
Loads of digital resources for the study of Late Antiquity, with more detailed introductions than provided here.
A good introduction to Islamic mysticism.
Frequently updated blog on Judaism in antiquity by James R. Davila.
Very thorough blog on Greco-Roman material, Biblical resources, and online tech for Classicists.