This feels a bit like a 'pass the time' type of thread, but hey what's wrong with that
I quite enjoy digital photography so I have:
- Rapid Photo Downloader
- Portrait Pro (used sparingly)
- Virtualbox with W10 for some windows specific Canon photography apps
I also do a bit of web development, and for that:
- Default to Firefox
- Vivaldi, Opera, Chrome and Chromium sitting as alternatives (Oh, and Edge installed out of curiosity!)
Music and Video
- Rhythmbox, Audacious, Audacity, Celluloid, Kdenlive
Occasionally also use qBittorrent.
I'll admit I have over time installed a shed load of other stuff, sitting there waiting for a day when I have nothing else to do!
Another App that I haven't seen mentioned is Zim Desktop Wiki
I've started using this to keep a record of changes I make to the system, a list of useful Terminal commands, tips about photography, and anything else that I think is useful to keep a note of. It's easy to use, easy to find stuff, and keeps everything under one umbrella.