An email service that uses addresses like yourname-appname@port87.com to organize all your email into a folder for every app/service.
You can also make these addresses screen senders before their email goes through, for something like yourname-friends@port87.com.
You can mark them as public and they’ll be included in a list if someone emails the bare address (yourname@port87.com), so you can share your bare address all over the internet without getting spam.
(Full disclosure: I created and operate this service.)