Encyclopedia of the Occult
I've been collecting odd bits of obscure information about the occult for a long time ... names used in invocations, words of power, names of deities from all over the world, titles of grimoires, names of demons, information on seals, amulets, talismans, spells, voodoo, familiars, secret alphabets, mythology, the Key of Solomon, etc.
After 11 years of collecting this stuff in a database, I did a text dump. It is searchable using the "Ctrl-F" function. It has about 3,800 separate entries.