Asklemmy

• Moshidon: letting me communicate with people on Mastodon
• QKSMS: text message (SMS) app
• KISS Launcher: a very neat launcher that took a while before I could love it as I do now
• FairEmail: an email client with tons of options
• Mull: a fork of Firefox
• Privacy Browser: a browser based on WebView
• Simple Calendar Pro: for managing my self-hosted CalDAV (waiting for Fossify's version)
• Fossify Gallery: managing my images and videos
• AntennaPod: listening to podcasts
• Bitwarden: managing my self-hosted vaultwarden
• Download Navi: download files instead of using the browser
• Foxy Droid: making browsing apps on mainly F-Droid and IzzyOnDroid like old-school Google Play Store
• Loop Habits: logging my habits
• Hypatia: protecting my smartphone from malware using ClamAV
• Lemuroid: able to play my childhood favourite games wherever I am
• Miniflutt: read RSS posts through my self-hosted Miniflux server
• Mullvad VPN: protecting my identity wherever I am
• OpenTracks: track my movements
• Seal: download videos from mainly YouTube, but also converting YouTube videos to MP3 files (perfect for downloading music mixes for my bicycle trips)
• Syncthing: syncing important files to and from my desktop
• Voyager: browsing Lemmy
• URL Radio: listening to manually added radio stations
• Tasks: reminding me to do stuff
• Unexpected Keyboard: by far the best keyboard with really good shortcuts
• Planisphere: exploring the sky and letting me plan my astro photography
• LibreTube: exploring YouTube through Piped API
• Simple Voice Recorder: letting me record stuff when I don't have my audio recorder with me (waiting for Fossify's version)

Keyboard:

• AnySoftKeyboard good all around keyboard, good language support, decent though messy customizability
• Unexpected keyboard more specialized, provides easy access to app (printable) ASCII characters and some others, allrght customizability
• 8Vim Cool factor, great customizability, decent language support but you need to learn it

Games:

• Pirate Solitare nothing much but I've been playing it a lot lately
• Simon Tathman's Puzzle Collection a cross platform puzzle collection, has a lot of different puzzles in a uniform style
• Antimine minesweeper with nice ui

System:

• RethinkDNS: DoH provider and firewall Easy to use, especially nice for those non FOSS apps you need to have to maintain a social life, not that powerful though
• Obtainium: FOSS app downloader Downloads apps from releases or equivalent, therefore can have faster updates than fdroid, but no discovery, aside from search on some platforms
• ffupdater: FOSS browser downloader Like obtainium, but for browsers (mostly) and has list of browsers
• Droid-ify: fdroid client better ui than the default app, comes with a list of repos
• Shizuku: ADB shell api not useful if you have root (see SUI, which is the root implementation for the same api, though shizuku will also work I think), but can give a bit more access if you don't supports wireless debugging on A12+
• Neolauncher: launcher nice ui but nothing special
• SD Maid SE: storage cleaner okish ui, doesn't stop me from having 302 (not including system) apps on my device. Yes I have a problem
• Package manager: app manager Shizuku support, powerful, though limited if you don't have root
• Inure: app manager [freemium (8$), but GPL licensed?] pretty must like Package manager but with amazing ui

Media:

• LibreTube: Piped (youtube) client Nice ui, no ads, sponsor block support, kinda unstable
• Innertube: YouTube music client doesn't use piped/invidious, no ads, nice ui
• Tusky: mastodon client nice ui, quite stable, multiuser support
• Jerboa: lemmy client ok ui, up to date with lemmy updates
• Liftoff: lemmy client nicer ui then Jerboa but doesn't work since .15 (?) and had issues with rendering markdown properly
• LibreTorrent bitTorrent client for downloading all those isos and public domain works, nice ui

Misc:

• Mull: ff based browser not much to say, "security oriented and deblobbed", upstreams some features from Tor
• Calculator++: A scientific calculator A lot of functionality while remaining easy to use
• RPNcalc: A Reverse Polish Notation calculator best RPN calculator I've found on fdroid, less powerful than Calculator++, but RPN based calculators are more efficient^[citation needed]^
• Simple Apps: suit of apps providing basic functionality great ui and customizability, I don't use simple keyboard, simple launcher/drawer however
• OpenCamera: a camera app advanced features

Just the apps I thought of, as I, as mentioned in the SD Maid entry, have a lot of apps installed :P

Obsidian isn't FOSS. I highly recommend Logseq but keep in mind they require CLA signing for contributions

Not sure about the rest of those, but Obsidian isn't OS either.

THANK YOU for antennapod!!! What an incredibly beautiful app, I'm so impressed!!

FairEmail

I am lazy, so let me just put the link to my non-root smartphone guide with a section for FOSS Android apps.

https://lemmy.ml/comment/101358

All of these list are great as we discover new apps each time.

But, I would suggest to write what is the app about.

Obtainium is pretty good

F-Droid, Voyager, Eternity, Libretube

• Thunder: Lemmy App
• Scrambled Exif: Removes metadata when sharing images
• Feeder: Rss Reader
• KISS Launcher: Home Launcher
• NewPipe: PeerTube and YouTube app.
• Omni Notes: Notetaking
• StreetComplete: Easy, fun, and addicting way to make OpenStreetMap updates on the go
• OsmAnd~: Maps and navigation. Works phenomenally when in the backcountry and uses cell towers to locate you when gps alone can't.
• Tower Collector: Contribute BTS towers for the above.
• VLC: Video player
• WiFi Analyzer: Useful for improving and setting up WiFi networks.
• UntrackMe: Transforms links into their OSS alternatives.

FeedMe (Not FOSS. Open to suggestions)

The RSS or meal planning app? If it's the former I like Feeder. You can probably export and import all your feeds.

I think some of my favorites are LibreTorrent, Session, and NewPipe.

I am a big fan of open source engine recreations, even if I don't play them a ton, so DevilutionX and OpenMW are worth mentioning. I think Xash3D is also open source if you want to play Half Life on the go.

I think OpenRCT2 has an Android app but I haven't bothered figuring out how to set it up yet.

Newpipe
Aurora store
Organic maps
PDF viewer
Molly
Audile
Jellyfin
Nova Wallet
Openboard (though seems dead and looking for alternative)
Internxt

For keyboard I'm currently using OpenBoard and ThumbKey, the latter obviously not for everyone.

Adding to your list:

• Droidify
• Trail Sense
• NewPipe
• Logseq
• Syncthing
• Coffee
• Element
• Cryptomator
• VLC
• Geometric Weather
• Termux
• Noteless
• StreetComplete
• Translate You

I use KDE Connect as a media remote and to transfer files between my phone and computers. It has quite a few other functions, like remote mouse control, sms, seems to share clipboards as well.

https://kdeconnect.kde.org/

I use a few apps from the SimpleMobileTools suite. They aren't full FOSS, they have basic and pro versions where the basic version is GPL3 and the proprietary extended features cost a few bucks. The basic FOSS tools are still decent, if barebones.

The suite includes:

• a calculator
• a phone dialer
• a music player
• a calendar
• a photo gallery (with basic editor)
• an audio recorder
• a flashlight
• a clock
• an app launcher
• an SMS messenger
• a camera
• a keyboard
• a note taker
• a file manager
• a contact book
• a simple painting canvas

I use the gallery and file manager the most. Though admittedly I threw a couple bucks their way for the proprietary extensions. It's not FOSS, but if it was going to be proprietary, I think it's one of the fairest deals in software these days. Better than another bloody subscription model, or holding the ad-free experience hostage behind a paywall.

Catima - for saving arbitrary barcodes and stuff that are hard to integrate into other wallets. I keep my local library card in there, and it works wonderfully

Nonocross - fun little game that has zero frills and distractions. Also very responsive on their github to suggestions and improvements

Termux - when I need to get into things from afar, this is how I do it

Box, Box! - Formula 1 news, schedules, standings, etc

Coffee - Sometimes I want to keep the display awake, so this comes in handy

My favourites so far.

• PlainApp
• Rethink
• Audile (Shazam FOSS)
• Notally
• OpenBoard (keyboard)
• Material Files
• QKSMS
• OsMand~
• Forecastie
• Obtainium
• Newpipe
• Cromite (Bromite fork)
• Monocles translator

Not open-source but the only gallery I found without trackers:

• Gallery made by Greensoft infotech

Obsidian is Open Source? I switched to Logseq because it wasnt open source. A friend wasnt even allowed to install it on his Work PC becauze Obsidian wants 50€ per Year when not used at home privately.