If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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Some more I did not see others mention. For Linux:
For Android:
I also recommend the site: https://alternativeto.net/ . You can just search and it will tell you the most used FOSS apps in any category you want.
Sometimes it feels like I'm the only one using geany. Nice to see it mentioned.
Yes, I am more in favor of basics. Emacs and VIM are just to complicated. IDEs, well sometimes I use but usually I start in Geany or nano and only use an IDE if it makes sense. Often not.
Firefox and VSCodium
Jerboa might be added to the list soon.
Firefox
Nextcloud
Home Assistant
Bitwarden
Tusky
Jellyfin
Pihole
Jerboa
As well as several others that I can't think of at the moment.
These two are now the first apps I install on any new device:
Basically, my approach is to (mostly) prioritize text over icons, and reduce the colors I need to process.
Other apps:
The humble grep.
Linux, Qtile, Firefox, Bitwarden, neovim, espanso, and others. So many great tools for those willing and able to do a little digging.
Firefox
libre office
obs studio (free, not 100% sure if os)
The O in OBS stands for open :)
Osmand - I use this along Google maps, but it's nice to have entire regions downloaded and it shows more information than Google maps, specifically for back country stuff where you need to see every type of trail
Home Assistant
Wireguard - I love that the protocol is lightweight and secure, makes it really easy to access my home network without needing to expose self hosted stuff to the internet
Bitwarden - self hosted with vaultwarden/SQLite, changed my life and it's really easy to share logins with my partner
Immich - self hosted, the first real replacement for Google photos I've found. It has autobackup and it's really easy to share albums.
Kiss Launcher - I like how simple it is. My home screen ends up disorganized anyway so it's honestly just faster to have a recents list and a quick search feature.
For me it's ViMusic. I was stuck with a shitty Spotify subscription that I couldn't afford until I found Vi. It has pretty much all the bands I like and it passed my moms rigerous examination (she listens to all of of really obscure stuff) so when her Amazon subscription ran out, I got her to start using that instead. Suck it jezzy b!
KDE Connect means that I can ping my phone that's usually presumably somewhere behind my bed or on a counter somewhere, without having to sheepishly walk to the nearest person and ask "can you call my phone I lost it :c"
The list is too long. If I'm forced to choose 5, I guess they'll be,
Recently id say OsmAnd~. GPX tracks are great for long bicycle trips and the drinkng water overlay is a lifesaver!
trips can be planned and saved as gpx with https://gpx.studio/ !
Ive been using brouter.de but i will check out gpx studio
Firefox and Helix
Mull
K-9 Mail
LibreTube
Quillpad
Droid-ify
i3. Once I got used to tiling window managers I just can't use anything else.