A very nice list. I believe the entire Simple Mobile project has been forked to preserve the brilliant apps before their new owner completely butchers them. However, I don't have a link handy right now.
Actually, I have. It gives me better tracking protection than vanilla Safari, it allows me to use SearXNG, and it means I can set a custom homepage. Also, for some reason, Safari has no private mode on my phone.
Not to mention that Mozilla is working on a Gecko-based version of the browser, as Apple is being forced by the EU to allow sideloading, third-party app stores, and third-party browser engines.
Organic Maps (maps app based around OpenStreetMap)
Cryptee (encrypted notes)
Matrix (chat)
LibreOffice + Collabora Office (office suite)
Kiwix (offline Wikipedia & other wikis)
NetNewsWire (RSS reader, for news)
Arms of the Fediverse I Use Regularly:
Mastodon
Pixelfed
Lemmy
PeerTube
WordPress
Dormant Arms of the Fediverse:
Friendica
Kbin
Funkwhale
WriteFreely
I have installed Linux on all four of my laptops, and I'm hoping to migrate from my iPhone to a Pixel with DivestOS as soon as I move out of my parents' house (I'm currently 17), or sooner if possible.
I have also swapped many web apps for desktop apps, and my music collection has been based around CDs and DRM-free files since it started in 2016. In addition, I still use DVDs, VHS tapes, and (to a lesser extent) good old-fashioned Torrents for my films and TV shows.
If the internet becomes altogether too bad, there's always Gemini. Making web apps is trickier, but entirely feasible.
Honestly, I like Breeze. I just change the colour and it works.
I am also quite a fan of Oxygen and Mint-X; but they look out-of-place on my newer systems, and my older systems have trouble running Plasma.