I became aware of this resource over at Biblical Studies and Technological Tools Blog. According to their own words, Biblindex is a resource that, “The ultimate goal of this site is to permit the identification of biblical quotations in all Jewish and Christian literature of Late Antiquity and the Middle Ages. For the time being, it already allows simple interrogation in a corpus of about 400,000 biblical references.”
The Biblical Studies and Technological Tools Blog has a presentation of the site, and so has some other bloggers too. You must create a user account before you can use the resource, but that should not be a hindrance to anybody to use such a rewarding tool.