[bluedino]

I can't think of too many apps that I use that are truly FOSS.

Databases, compilers/interpreters, web servers, operating systems...but apps? (Other than gnu/bad command line tools of course)

[zellyn]

For me: Emacs, NetNewsWire, Gimp, Inkscape, Calibre, Firefox, Chrome, occasionally VS Code, very occasionally whatever Audacity is called today.

And I’m a Mac user!

[rglullis]

To add to your list: Atril (PDF Viewer), Vokoscreen (Screen recorder), Transmission (Torrent CLient), Simple Scan (Scanner Tool), LibreOffice, Keepassxc, Thunderbird, Element Desktop, Dino, Handbrake, Beets (Music Collection Tagger/Manager), VLC, Kodi, Rhythmbox (Music Player), Syncthing

If I look at my phone, it's possible that I have more apps installed via F-Droid than through Google Play

[thelaxiankey]

Typically a FOSS community seems to take a while to get started, but once it gets going (Blender, Linux, etc) it tends to stick around and even seriously gain traction.