On my mobile with GrapheneOS:

• Aard 2 (dictionary, since QuickDic doesn’t seem to work on my Pixel 7)
• Breezy Weather
• Fossify Suite (Calendar, Clock, Contacts, Gallery, Messages, Notes)
• Currencies
• DAVx5 (calendar sync)
• Feeder (RSS)
• FUTO keyboard HeliBoard
• Hypatia (malware scanner)
• Island (work profile enabler)
• K-9 Mail
• KeePassDX
• Molly (Signal fork)
• Music Player
• Nextcloud
• Obtainium (update apps from source)
• Oeffi (public transport)
• OSMAnd
• Rethink DNS
• StreetComplete
• Threema Libre
• Tor
• Tusky (Mastodon)
• Vanadium (GOS Browser)
• Voyager (Lemmy)
• Who Bird (bird call identifier)

More FOSS apps on my notebooks with Fedora, but not on a daily basis.

I made my own curated list of open source software. Most of the software on there is stuff I use.

On my laptop:

• Void Linux
• GNOME (desktop environment)
• gThumb (image viewer that can do simple edits)
• Firefox (the famous web browser)
  • uBlock Origin (content blocker that blocks ads, trackers, etc. out of the box)
  • SponsorBlock (automatically skips sponsor segments in YouTube videos)
• Betterbird (fork of the Thunderbird email client, with various QoL tweaks)
• GIMP (image editor)
• Kdenlive (video editor)
• virt-manager (manage QEMU virtual machines)
• Celluloid (media player)
• yt-dlp (command-line utility for downloading YouTube videos, and the basis of some graphical apps as well)
• Bottles (if you want to use Wine to run Windows apps, without too many headaches)
• Foliate (.epub ebook reader)
• OBS (for screen recording and livestreaming)
• Code - OSS (code editor, “clean” version of Visual Studio Code without “Microsoft-specific customizations”)
• Tenacity (fork of the Audacity audio editor without opt-out telemetry)

On my Android phone:

• F-Droid (app store with FOSS apps only)
• Obtainium (auto-updater for apps hosted on GitHub, GitLab, etc.)
• Heliboard (simple keyboard app)
• Material Files (file manager)
• Metro (local music library player)
• Iceraven (Firefox fork with a few tweaks)
• Voyager (mobile client for Lemmy, similar to the obsolete Reddit clients Apollo and Slide)
• Fedilab (client for Mastodon and similar Fediverse services)
• Termux (run Linux CLI applications on Android)
• Thunderbird for Android (simple email client for Android and the successor to K-9 Mail)
• MJ PDF Reader
• Binary Eye (simple QR code scanner)

Cross-platform:

• LocalSend (simple file transfer between devices on the same network)
• Bitwarden client apps (to manage passwords. I use the Vaultwarden instance @ tchncs.de)
• Mullvad VPN client

If we can count FOSS modifications of proprietary apps:

• YouTube Revanced (the official YouTube app, but you don’t get ads, you can play videos in the background, you get SponsorBlock, etc.) (follow this guide for auto-updates)
• Vesktop (desktop client for Discord, has Vencord preinstalled and supports Linux screen sharing)
• Prism Launcher (Minecraft: Java Edition launcher that allows you to easily manage different “instances” of the game. Good for playing with different mods and/or versions)
• Fabulously Optimized (modpack for Minecraft: Java Edition, that improves performance and adds some minor QoL features)

addendum: I’d like to use Matrix (via the Element client) and Signal more, but most of the people I know are on Discord and WhatsApp instead.

Desktop

• Arch Linux
• GNOME
• Firefox
• Tilix
• Thunderbird or Evolution
• Vim (I still use PyCharm for writing code)
• Joplin
• Bitwarden
• Python

Phone

• Joplin
• Firefox Focus & Firefox
• Bitwarden
• New Pipe
• Thunderbird (K-9 Mail)
• Signal
• Aegis
• Antenna Pod
• VLC
• The FOSSify suite (not the dialer)

A lot.

Desktop/Laptop

• Artix Linux
• Neovim
• BSPWM
• Suckless Terminal
• Librewolf
• Firefox
• Ungoogled Chromium
• Thunderbird
• mpv
• rtorrent
• Keepassxc
• btop (TUI resource monitor)
• links (old school TUI browser)
• newsboat (TUI RSS reader)
• yt-dlp
• git
• Espanso (text expander)
• GIMP
• Inkscape
• Krita
• Calibre (for epubs, great with Kobo ereader)
• Wireshark
• Lutris/WINE/Proton
• OBS

Phone

• Android/GrapheneOS
• Heliboard
• FUTO Voice (Speech to Text)
• Mull
• Vanadium
• Various Fossify Apps
• Keepassxc
• Thunder
• Tusky
• Thunderbird
• Tubular
• Seal (yt-dlp wrapper)
• mpv
• Antennapod
• Feeder (RSS reader)
• Glider (HN client)
• OSMand
• Stealth (Reddit lurking)
• Element (Matrix client)
• Transistor
• Translate You
• Protonmail
• Proton Drive
• Breezy Weather
• URLCheck
• Wikipedia (official reader)

Oh boy! Here goes

Desktop:

• Bazzite
• KDE Connect
• KiCAD
• FreeCAD
• Plasma
• LocalSend
• Thunderbird
• Bitwarden
• Code OSS
• Krita
• CoreCTRL
• LibreOffice
• CuteCOM
• KopiaUI
• Calibre
• Heroic Games Launcher
• Lutris
• PrusaSlicer
• Okular
• Inkscape
• FluffyChat
• SyncThingy
• Elisa
• Haruna
• Kdenlive
• YouTube Downloader GUI
• Paperwork (stille can’t get network scanners working on Bazzite with sane set up)
• Solar
• ProtonUp-QT

Phone:

• AntennaPod
• Immich
• Aegis
• Heliboard
• Organic Maps
• Breezy Weather
• Aurora Droid
• K9 mail
• Signal
• Fluffy chat
• Home Assistant
• Eternity
• Findroid
• Gadgetbridge
• Fitotrack
• Loop habits
• Tuta
• StreetComplete
• Wireguard
• Unit converter untimate
• mastodon
• ntfy
• newpipe
• KDE Connect
• bitwarden
• findroid
• localsend
• material files

server:

• Leantime
• Bookstack
• Immich
• Jellyfin
• Home Assistant
• Traefik
• Crowdsec
• Authelia
• Dozzle
• Glances
• full *arr suite
• transmission + wireguard
• paperless-ngx
• cloudflare-ddns
• syncthing
• valheim server
• Boinc
• stash
• ntfy.sh

If I donated $5 per month to each of these projects I would be broke 😂

My most used:

• self hosted Matrix server with Element client
• Jellyfin server and clients
• self hosted Radicale server for my family calendars
• self hosted Joplin server with the Joplin app on all my machines and devices for my notes
• Navidrome
• Firefox
• tasks.org with my self hosted nextcloud
• all the fossify apps on my phone
• audiobookshelf server and client
• GNU/Linux (various distros across different machines)
• Voyager for Lemmy

There’s a bunch more that I can’t think of that I use, but the above list is the stuff I rely on and use every day.

On Android :

• ⭐Kvaesisto launcher
• ⭐Acode
• Blichess
• ⭐Brave browser
• ⭐Cuscon
• Data monitor
• Drip
• Droidify
• ⭐ FetchIt
• Right files
• ⭐ Right messages
• Fossify gallery
• Libchecker
• ⭐Linkora
• Inkwell keyboard
• Obtainium
• ⭐Octogram
• Oincoin
• ⭐PocketPal
• ⭐Proton VPN
• ⭐Quillpad
• ⭐Record You
• Simply translate
• ⭐Termux
• ⭐Thunder
• ⭐Tubular
• VLC
• ⭐Windscribe VPN
• Warden
• Zcalc
• I also used to use apps like Anytime podcast , Focus podcast , Book’s story , Hacki for hacker news , Rain , Weather master , Heliboard (I’ll reuse it again because inkwell and florisboard still don’t support typing suggestions) and other apps I can’t remember right now

Matrix (element on mobile, cinny on pc), materialious (linux app for invidious, alternative yt frontend), gzdoom (foss engine for doom & mods), luanti (a minecraft-like engine for playing minigames and shit), zen browser (firefox fork with a pretty skin), xfce as desktop environment, wine for playing windows games

Dosbox (magic dosbox for android) Scummvm (scummvm for android) UnCiv Obsidian Obtainium URLCheck

I use GVIM everyday.

I frequently use CentOS because that is what the embedded system I work on runs.

I use cygwin regularly professionally and at home. Identifying specific software within it is tough, but I definitely use grep and g++ all of the time.

Firefox, syncthing, antennapod, organic maps

Here is a short list.
Pc: Cachyos(Preformant linux distro based on arch),Cinnamon (fork of Gnome 3),Librewolf (web browser)
Android phone:F-Droid(Appstore),Clipious(YouTube client but network is nonfree),aurora store(replaced Google play store with this and network nonfree),Iceraven (Web browser,Can be hardened as much as mull.),
Cross platform: Localsend(Airdrop for any device),Vlc media player
Yeah that’s it,here is my major apps I use

deleted by creator

Voyager for Lemmy, Thunderbird email client, Firefox browser, Librera FD ebook reader, Mercurygram for Telegram, QUIK SMS, Material Files, LibreTube