The main thing I thought of would be Bluetooth connection to a 'true random' number generator running off muons, cosmic background radiation or whatever. You can look up how to diy one, and it would be a simple matter to hook it up to Bluetooth. This could power Terry Davis's hymn creator, or God communicator. You could even modify the literature input/dictionary to 'talk' to different entities, also a coin toss or dice
This would fall under a 'creatives' category, alongside potentially an AI for illustrations or sigil creation, idk if that would be possible or too big. A background mantra, prayer or chant repeater for manifestation, maybe linked to the same thing as randonautica.
The second category would be 'resources', things like dictionaries, gematria, dream recorders, EMF capability, literature/theory. You of course would be able to customise whatever literature there is to suit your field. Anyway that's all I can think of ATM