Ask HN: Interesting TUIs (text user interfaces), maybe forgotten ones?

I use relatively few TUI's, and don't know much about them—about what good, convenient UX flows in TUI's can look like. I want to write some in Emacs. Do you have particularly nice examples of TUI's that deserve to be known and imitated? I know there's a lot of abandoned programs from the pre-GUI era that refined TUI's to a high level.

(I'm only familiar with a handful of modern ones in Emacs—Magit, the SLIME inspector, dired, as well as the terminal TUI from the Linux tool perf).