Gone Man’s Switch is a simple web application that allows you to create messages that will be delivered by email when you are absent (gone) for a certain period, AKA a dead man’s switch.
It is a free self-hosted alternative to deadmansswitch.net. It doesn’t have as many features, but it does the job.
More info in the GitHub repo: https://github.com/jhonderson/gone-man-switch
I’d set up something like that, to hand out the password to a (previously prepared) Keepass database, in case something happens to me. To have everything readily available for my loved ones, to aid with cleaning up after me.
Ok, that makes sense.