FOSS - Free Open Source Software
2F Authenticator
-Ente Auth=https://github.com/ente-io/ente/tree/main/auth#readme
Alarm, Stopwatch, Timer
-Chrono=https://github.com/vicolo-dev/chrono
Android Launcher
-Kvaesitso=https://github.com/MM2-0/Kvaesitso
App Firewall/DNS Resolver
-Rethink=https://github.com/Katya-Incorporated/REThink
App Installer
-Obtainium=https://github.com/ImranR98/Obtainium
App Management
-Warden=https://gitlab.com/AuroraOSS/AppWarden
Audiobook player
-Voice=https://github.com/PaulWoitaschek/Voice
Barcode scanner
-Barcode Scanner=https://gitlab.com/Atharok/BarcodeScanner
Bible Research
-AndBible=https://github.com/AndBible/and-bible
Birthday Tracker
-Birday=https://github.com/m-i-n-a-r/birday
Bluetooth Radar
-BLE Radar=https://github.com/Semper-Viventem/MetaRadar
Book Collection
-NeverTooManyBooks=https://github.com/tfonteyn/NeverTooManyBooks
Book/Document Reader
-Librera Reader=https://github.com/foobnix/LibreraReader
Bookmarks sync
-Floccus=https://github.com/floccusaddon/floccus
Browser
-Iceraven=https://github.com/fork-maintainers/iceraven-browser
Cache Cleaner
-Cache Cleaner=https://github.com/bmx666/android-appcachecleaner
Calculator
-Unitto=https://sadellie.github.io/unitto/
CalDav/CardDAV sync
-DAVx⁵=https://github.com/bitfireAT/davx5-ose
Calendar
-Etar=https://github.com/Etar-Group/Etar-Calendar
Clipboard cleaner
-Memory Guardian=https://github.com/hashemi-hossein/memory-guardian
Cloud service
-Nextcloud=https://nextcloud.com/
Contacts Management
-Fossify Contacts=https://github.com/FossifyOrg/Contacts
Day Tracker/Count
-Countdate=https://github.com/sk5s/countdateapp
Diary [Notes & Observations]
-DiaryVault=https://github.com/SankethBK/diaryvault
Dictionary
-freeDictionaryApp=https://github.com/yamin8000/freeDictionaryApp
Digital Music Book
-ChordReader 2=https://github.com/AndInTheClouds/chordreader2
Document Scanner
-OSS Document Scanner=https://github.com/Akylas/OSS-DocumentScanner
Document Viewer
-LibreOffice Viewer=https://www.libreoffice.org/download/android-and-ios/
Ebook downloader/converter
-Alexandria=https://github.com/aloussase/AlexandriaApp
Email client
-FairEmail=https://github.com/M66B/FairEmail
Emulator Frontend
-RetroArch=https://www.retroarch.com/
Extension source for Videos/Comics/Novels
-Miru=https://github.com/miru-project/miru-app
F-Droid client
-Droid-ify=https://github.com/Droid-ify/client
File management tool
-SD Maid SE=https://github.com/d4rken-org/sdmaid-se
File Manager
-Fossify File Manager=https://github.com/FossifyOrg/File-Manager
File Storage
-Filen=https://filen.io/
File synchronization
-Syncthing=https://syncthing.net/
File Transfer
-LocalSend=https://localsend.org/#/
Finance Manager
-Money Manager Ex=https://github.com/moneymanagerex/moneymanagerex
Fitness Tracker
-GymRoutines=https://codeberg.org/noahjutz/GymRoutines
Flashcard Learning
-AnkiDroid=https://github.com/ankidroid/Anki-Android
Google Play client
-Aurora Store=https://gitlab.com/AuroraOSS/AuroraStore
GPS Logger
-GPSLogger=https://github.com/mendhak/gpslogger
Guitar scale practice
-Scale Practice=https://github.com/aburdiss/ScalePractice
Icon pack
-Arcticons=https://github.com/Arcticons-Team/Arcticons
Internal storage save
-Save Locally=https://github.com/MateusRodCosta/Share2Storage
Keyboard
-HeliBoard=https://github.com/Helium314/HeliBoard
Location Finder
-MyLocation=https://github.com/mirfatif/MyLocation
Loyalty Card/Ticket Manager
-Catima=https://github.com/CatimaLoyalty/Android
Lyrics finder/downloader
-SongSync=https://github.com/Lambada10/SongSync
Mirror App
-Mirror=https://github.com/0x50f13/Mirror
Mobile remote control tool
-KDE Connect=https://kdeconnect.kde.org/
Music Encyclopedia
-MusicBrainz=https://github.com/metabrainz/musicbrainz-android/
Music Identifier
-Audile=https://github.com/aleksey-saenko/MusicRecognizer
Network toolset
-Wi-Fi Info=https://truemlgpro.github.io/Wi-Fi_Info/
Note-taking
-Notesnook=https://notesnook.com/
Notification Dictionary
-Notification Dictionary=https://github.com/tirkarthi/NotificationDictionary
Offline browsing
-Kiwix=https://github.com/kiwix/kiwix-android
Offline Navigation
-Organic Maps=https://github.com/organicmaps/organicmaps
OpenOffice Document Reader
-OpenDocument Reader=https://github.com/opendocument-app/OpenDocument.droid
Password Manager
-Bitwarden=https://bitwarden.com
PDF Reader/Viewer
-MJ PDF=https://gitlab.com/mudlej_android/mj_pdf_reader
Permission Manager
-Permission Pilot=https://github.com/d4rken-org/permission-pilot
Phone Management for PC
-PlainApp=https://github.com/ismartcoding/plain-app
Phone Tracker
-FindMyDevice=https://gitlab.com/Nulide/findmydevice
Photo/Video cloud service
-Ente Photos=https://github.com/ente-io/ente
Photo/Video gallery
-Fossify Gallery=https://github.com/FossifyOrg/Gallery
Podcast Manager
-AntennaPod=https://github.com/AntennaPod/AntennaPod
Privacy friendly browser updater
-FFUpdater=https://github.com/Tobi823/ffupdater
Quotations/Affirmations Widget
-QuoteUnquote=https://github.com/jameshnsears/QuoteUnquote
Recorder App
-RecordYou=https://github.com/you-apps/RecordYou
Reddit client
-RedReader=https://github.com/QuantumBadger/RedReader
RSS reader
-Feeder=https://github.com/spacecowboy/Feeder
Spirit level and ruler
-Bubble=https://github.com/woheller69/level
Spotify client
-Spotube=https://github.com/KRTirtho/spotube
Streaming/YT Front-end
-LibreTube=https://libretube.dev/
-NewPipe=https://newpipe.net/
System API direct access
-Shizuki=https://shizuku.rikka.app/
Tablature editor and player
-TuxGuitar=https://github.com/helge17/tuxguitar
Tagging Document Manager
-TagSpaces=https://www.tagspaces.org/
Task Management
-Anytype=https://github.com/anyproto/anytype-ts
Task Manager
-Tasks.org=https://tasks.org/
Text Editor
-Xed Editor=https://github.com/RohitKushvaha01/Xed-Editor
Text Expander
-Text Tools Pro=https://github.com/lochidev/TextToolsPro
Tracker/Ad monitor
-TrackerControl=https://github.com/TrackerControl/tracker-control-android
TTS Notifications
-Voice Notify=https://github.com/pilot51/voicenotify
Tuner App
-Tuner=https://github.com/thetwom/Tuner
Unit Converter
-Converter NOW=https://github.com/ferraridamiano/ConverterNOW
Video Player
-Nova Video Player=https://github.com/nova-video-player/aos-AVP
VPN client
-Proton VPN=https://github.com/ProtonVPN/android-app
Weather App
-Breezy Weather=https://github.com/breezy-weather/breezy-weather
Weight Tracker
-Waistline=https://github.com/davidhealey/waistline
Wi-Fi Analyzer
-WiFi Analyzer=https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/
Wikipedia client
-Wikipedia=https://github.com/wikimedia/apps-android-wikipedia
FCSS - Free Closed Source Software
Instant Messengers
-Discord=https://discord.com
-WhatsApp=https://www.whatsapp.com/
Music Streaming
-Spotify=https://open.spotify.com
Navigation
-Google Maps=https://www.google.com/maps