@itsfoss here are some more I'd like to add:
- GNU Emacs
- GNOME Boxes
- KDE Connect
- Syncthing
These are some applications I've delved deep into in 2024
@magitian Thank you for sharing your thoughts. 
@itsfoss does Cartridges import HTML games? (probably not, but I figured I'd ask.)
@itsfoss great list, just fyi: Floorp isn't primarily privacy focused, instead is focused on speed of browsing and usability.