Possibly dead, but a cool project none the less.

https://github.com/jesseduffield/horcrux

Vaultwarden let’s you designate someone to take over your account if they request it and you don’t respond within a week

It might be cool, but it seems like it would be missing the context and documentation that would be present in it’s project repo.

https://linkwarden.app/

maybe? Not sure if it lets you share without an account.

Not really. If that’s a hard requirement, check out what is supported by openwrt or freshtomato.

There was a similar question a few days ago with some points about wifi adapters vs access points brought up.

https://lemmy.dbzer0.com/post/36614200

You’d probably be a lot better off buying a decent access point (unifi, mikrotik, Aruba instanton).