[Nowado]

I was thinking about similar solution (actually, textblaze funded by YC is pretty much that) but I didn't like remembering the shortcuts part. So I made a different kind of indexing for it: https://discu.space/ Presentation uses 'what are you answering to' as a key, but you can use anything.

It currently exists as (hopefully working for everyone, could use more testing) Chrome extension, but there's a universal API underneath. It could be run entirely locally if one was to give up portability.