Vaultwarden can send a link to a person of your choosing with all your passwords if you do not login within a certain amount of time. This is key… Mortgage, banks, wifi, email, utilities, credit cards… This list goes on.

Had a friend pass and his wife could not cancel some things without a death certificate, even then she had a hard time.

Monicahq is a personal CRM. You can share some info publicly. Unless I missed that feature. I have yet to find an open source gift registry.

A gift registry for multiple users. Would be great for Xmas