That’s a Soundbrenner Core Steel. It features smart vibrating metronome, contact tuner, db meter and it also works as a smartwatch getting notifications from the phone (if paired). I used it as a metronome, very helpful when live looping and in other contexts. You can get it (or any other soundbrenner model) with a 20% discount using the code BELIBAT20 at checkout: https://soundbrenner.com ;). Source: almost 3 years ago

The Soundbrenner Core gives you a smarter and more reliable set of fundamental music tools in a premium wearable. It serves as your everyday watch plus a 1) vibrating metronome 2) contact tuner 3) dB meter and 4) smartwatch. Learn more on soundbrenner.com. Source: almost 3 years ago

Sup is also “a console-based email client for people with a lot of email”: https://sup-heliotrope.github.io/. - Source: Hacker News / about 1 year ago

A long time ago I used https://sup-heliotrope.github.io/ , which is sort of mutt with a gmail approach to email. Being a curses-based email client, it of course lets you shell out to vim for writing your email. Source: about 1 year ago