What I use:

I’m somewhat opposed to making this page, since I want people to want less, not more. But since so many people ask, this is what I use.

hardware

Silent desktop PC from 2014
Lenovo T440s laptop from 2013 - a daily clone of the PC
Studiobricks One Plus sound-proof recording booth ♥
AT5040 microphone
Panasonic GH-5 camera now only for video interviews
Moto G31 phone
Kensington Expert Mouse
Keychron Q3 keyboard with Kailh Midnight Pro silent switches
Industrial Athletic squat rack, barbell, plates, and bench, right next to my PC so a few times per hour I stop and do 5 reps, AKA “5×5”
Surly Bridge Club bicycle
Nissan Leaf car

Vim text editor, all day every day
PostgreSQL database
Ruby programming language
Sinatra web framework
Ratpoison wm
Nginx web server
OpenBSD operating system
OpenSMTPD email server
Radicale to privately self-host my contacts and calendar, synced to my phone
Firefox browser with uBlock Origin and Link Hints
Calibre to de-DRM ebooks
Everything but Firefox and Calibre in the terminal, so command-line tools like mutt for email, sox ffmpeg and mpv for audio/video, mupdf for ebooks, and ssh everywhere.

Vultr basic $10/month public server (my home computer is a clone of my live server)
Mailgun for outgoing email
Cloudflare for DNS and video
Netim domain registrar
Oxford English Dictionary for writing
Wikipedia for curiosity
Hacker News for random inputs