I've got (on a Mac) in order when switching windows (Cmd+Tab): Chrome, Notes, Slack, Terminal, TiddlyDesktop, Visual Studio Code, Finder, WhatsApp, Spotify, Postman, Kiwix, KaiosRT, TextEdit, TablePlus
Linux : PCManFM, VeraCrypt, xed, Terminal. Android : FX file manager, Fennec ( Firefox ), Termux.
Edit : Forgot mpv running in a tab in Termux. ( Listening to radio news. )
Mac: RubyMine, Terminal, Chrome, Sequel Pro, Sublime Text (scratch notes), [side screen: Slack, Spotify, Activity Monitor]
Kate, Yakuake, Dolphin, Android Studio/Emulator, KTorrent, Firefox, Docker, Amarok, Postman, VS Code
iTerm2, Slack, Safari with usually 1-5 tabs open at once, Robo3T, Docker, and the ubiquitous Finder. I’m a software engineer working on a web app. I’ll also have Postico and MS Teams (better than Slack for low-bandwidth screen-sharing calls) open occasionally.
PCManFM, Terminator, Chrome. I spend a lot of time on the command line, even writing code there. It's just where I feel comfortable, been using computers since 8 bit processors and DOS were all the rage.