GraveSafe
GraveSafe is a type of dead man's switch where if you check in every day, nothing happens. If you don't check in on a day, it notifies your trustees and they have the option, if two or more agree, to unlock a vault of information you've decided needs to be passed on. It can contain instructions on how to access your personal information, contacts, your will, passwords, etc. As soon as you check in again, your trustees are notified and your vault is re-locked.
I built it back in 2018 when I was traveling alone for about 5.5 years. If I disappeared, nobody would probably know for a while, and when they did notice, they wouldn't know how to get access to any of my information.
I haven't been on the road for nearly three years and I still use it every day. Eventually I'll turn it into a publicly available product, but for now I have too many other things I'm working on.