Pine
Used by 5 peoplewashington.edu ↗

“In rare cases I've had to actually build and run a CLI app like PINE or connect to a legitimate BBS to make sure I got the UI correct for one of the screens in the book.”
Jesse Holden Interview, Writer, creative dork · via Uses This 
“I also have a bag made out of recycled bicycle tires.”
Peter Richardson Interview, Map hacker (Mapzen) · via Uses This 
“And I have some weird devices that I like playing with, like my Neptune Pine phone-watch-thing which I only use on occasion for running.”
Evan Prodromou Interview, Developer, founder (fuzzy.io, Wikitravel, Identi.ca) · via Uses This 
“When I read email, I swear, I'm ssh'd into a shell account and running Pine.”
Andrew Plotkin Interview, Hacker, IF Wizard · via Uses This