It would be nice if it could also search through emails. I'm using emails to myself often as notes and bookmarks. Would be nice if they could be included in the search index.
It can index all your data (emails, whatsapp/imessage, gdrive, finance, health, etc) and notably also allows you to install a chrome extension to also capture and index pages you see on the web.
It builds a search index and connected graph of all this data.
I have just open sourced: https://github.com/omnesis-dev/Omnesis