Biblindex

Bibindex is one of those fantastic projects of the internet, where you can search for something that used to be only available to scholar of a specific field.  In this case it's a corpus of 400,000 biblical refernces in Jewish and Christian literature of late antiquity throught the middle ages.  You pick the chapter and verse, and optionally the author, country of origin or date, and it pulls up every reference to that section in those texts.  The UI is pretty poorly done, the + button means "select this thing and give me an optional other" which is entirely non-obvious, but it is powerful.  Free, but registration required

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