Free and Open Source Software

Bitwarden

Ankidroid— Create, share, borrow and study with flash cards

Firefox— Web browser

Rethink Firewall— Best firewall for android

Infinity— Gonna miss this one (Reddit client)

Libretube— Modern Youtube client using Piped

Obtainium—Keeps track of all my foss apps from their git repositories + them

Gnu IMP— Desktop photo editor

Aurora Store— Download apps from the play store

• Fedilab for Mastodon (an alternative to Tusky)
• Jerboa for Lemmy
• LibreTube for usable YouTube without an account
• FluffyChat for Matrix (an alternative to Element)
• FairEmail for mails
• Molly for Signal (pretty much the same as the original app)
• Forkgram for Telegram (also pretty much the same as the original open source version)
• Aurora for PlayStore apps
• F-Droid
• Fennec for browsing (the opener version of Firefox)
• Aegis for 2FA (an alternative to Google Authenticator)
• KeePassDX for passwords (an alternative to Keepass2Android)
• OpenKeychain for PGP Keys
• Orbot for connecting to Tor and running a Snowflake proxy
• RethinkDNS as DNS with blocklists, firewall and routing to Orbot via Proxy for all TCP connections
• Tutanota as synchronized calendar
• Osmand~ for navigation (an alternative to Google Maps)
• Transportr for public transport (an alternative to DB Navigator in Germany)
• In general the "Simple ..." apps on F-Droid are also nice

• F-Droid for FOSS apps

• Aurora for Google Playstore apps

• OSMAnd for navigation

• Oeffi for public transport

• many Simple Mobile Tools apps

• K-9 Mail

• Tor browser

• Shelter for isolating apps

• Tusky for Mastodon

• Jerboa for Lemmy

• Nunti for RSS feeds

• Molly for Signal

• Telegram FOSS

• Aegis for 2FA

• QickDic (dictionary)

• TinyWeather

• Threema Libre (not free)

vim

Some from the ones I use:

• F-Droid
• Fennec (firefox variant that supports custom addon collections)
• K-9 Mail
• Termux (terminal + Linux environment)
• Jerboa for Lemmy
• Wikipedia

• Aegis Authenticator
• Antenna Pod
• Unciv
• Shelter

Firefox

cant choose one because i enjoy using a lot of them:

1. bitwarden
2. inkscape
3. kdenlive
4. nextcloud
5. organic maps
6. signal games
7. shattered pixel dungeon
8. openttd

Emacs, that's all I need!

FairEmail is a great email client. Also everytime I reinstall my phone, I get the SimpleMobileTools line of apps, their apps like gallery or calendar are nice-looking and useful.

• LineageOS: my Android ROM of choice

• LineageOS for MicroG: the ROM on my second phone where I quarantine my use of apps that refuse to work without Google services (mostly stuff I need for business travel e.g. Amtrak, Google Maps)

• Aurora Store: allows installation of most Play Store apps without login. I mainly use this on the MicroG phone, but it's also needed to get the ProtonMail and ProtonCalendar apps (only ProtonVPN is on F-Droid)

• TrackerControl: allows fine tuned domain blocking on a per-app basis. Often allows you to block just ads and trackers but still be able to use an app or at least many of its features.

• Arcticons: monochrome line art icons (because I hate fun and want my GUIs to look like a terminal)

• AsteroidOS Sync: WearOS replacement. AsteroidOS still has a long way to go, but I doubt WearOS would play nicely with LineageOS and I don't want all the tracking anyway.

• Bubble: bubble level by woheller69 (a true F-Droid GOAT)

• FlorisBoard: afaik, only FOSS gesture typing Android keyboard (besides AnySoft, which doesn't seem to work consistently)

• GMaps WV: fairly locked-down web viewer for Google Maps (sadly OSM just doesn't have a usably complete business directory where I live)

• Librera: the PDF reader on F-Droid that I hate the least. (Anyone got any better recommendations?)

• NewPipe: ad-free Youtube player with locally stored subscriptions and playlists. An IzzyOnDroid fork with SponsorBlock is also available.

• QKSMS: my SMS app of choice

• Signal: because I can't convince my friends to switch to Briar

• SpoTube: pirate ad-free Spotify that works by looking up tracks on Youtube. Is therefore limited by what's available on YT and sometimes plays wrong tracks, but you can't beat the price :] Even interfaces with a Spotify account to play and edit playlists.

• Standard Notes: E2E encrypted cloud-synced notes. Also accessible by web browser, which has saved my ass a few times while phoneless

• Weather: by BeoCode on F-Droid

• VLC: everyone's favorite traffic cone boi

Inkscape for me :)

Here are my go to apps.

• Droid-ify - Fdroid client
• Mull - firefox mobile fork
• KeePassDX - password manager
• Tracker Control - VPN based, blocks trackers for installed apps
• Nebula (F-droid) - DNS based, can be used alongside tracker control
• Infinity for reddit - sad
• FlorisBoard Beta - keyboard but no development update for months now
• Notally - simple notes app
• Simple Calendar - part of simple tools/suite of apps
• Open Camera
• Fair Email - email client
• Moshidon - forked from an app I cant remember, nice material u design and fast
• Arcticons Icons - line icons for your homescreen
• SimpleLogin - create anonymus emails and disable them, helps prevent spam and address privacy control
• Tutanota - mail app for tutanota
• Jerboa - lemmy client
• Paisa - expenses manager app
• My Expenses - expenses manager app
• ExifEraser - removes metadata for the pictures

Bitwarden, Signal, Firefox, Sumatra PDF, Standard Notes, andOTP, and VLC Media Player

emacs

@tiring7616 firefox

Blender

Godot

Gimp

Probably the nicest Foss stack for game development.

I'm beginning to migrate from Windows to Linux, here are some foss apps I use:

• Blender -for 3d modelling
• Godot - Because im working to be a game dev
• Incscape and paint.net - for general raster artwork
• Brave - My primary browser
• VScode - I just prefer C# over godot's built in GDscript (Not to say GDscript is bad its a nice language but I just prefer C# as I used to use unity)

Edit, you said "must have" oops, but still like to share this anyways :))

• Feeder - for reading rss feeds, which takes up more of my time than all social media combined
• KeePassDX and Aegis - passwords and 2fa
• Vanilla Music
• Jerboa
• Droid-ify
• Quillpad - note app inspired by google Keep
• SimpleNotes - checklists. I don't like how Quillpad handles checklists.
• Newpipe
• Discreet Launcher
• FFUpdater - installs and updates browsers

OpenVPN. I can self-host a lot of different things for my own personal internet/cloud thingy - Bitwarden, Pi-Hole, etc; but to actually use it when I'm not home? I either pay for a VPS or I just have a VPN back to my home network. So much becomes possible with that; like I have the contents of my entire NAS at my fingertips even if I'm not home; I can render projects on a VM at home and manage it from my phone, etc.

OpenVPN is, without a doubt, the most important part of my infrastructure.

• Fairmail
• keepass
• firefly iii
• Firefox
• sumatrapdf

• Tachiyomi for manga

• personal Dns filter for blocking ads system wide

• Aegis for two factor authentication

• NewPipe x Sponsorblock for youtube

• Fritter for Twitter without an account

• Librera for reading my ebooks

• Feeder for RSS

• Quillpad for a Google Keep like local alternative

I will go with (neo)vim. Must have for me, use it for everything imaginable, writing emails,code, notes ...

Blender and Firefox for me have always been the apps that have their shit together the most. Both I perceive as insanely complicated pieces of software with a lot of features that work really well and compete with for profit corporations with way more resources.

The humble grep.

• KDE Connect
• LibreTorrent for Android
• Droid-ify for F-Droid
• Orbot for Android (I use it mainly for running the snowflake proxy)

Firefox.

Also:

Thunderbird Gimp Audacious

Firefox, LibreTube, Kaiteki

• Syncthing - for sycing what pretty much amounts to /home between my mobile and laptop
• Bitwarden - password manager
• ProtonVPN - VPN
• Trail Sense - Hiking tools, most frequently for barometric readings
• Proton Mail - email
• Coffee - keeps the screen on through a button in my notifications. Mostly used when cooking for recipes
• NewPipe - YouTube and downloading
• Droid-ify - Better UI for fdroid
• Aegis - OTP manager
• VLC - needs no introduction
• Kore - remote for Kodi
• Geometric Weather - simple weather app
• Noteless - markdown notetaker. I've mostly moved everything over to Obsidian, but I like my grocery list here still...

Bash

• Signal

• vinyl for music

• AnkiDroid for flashcards. I use it for languages, but i believe there are repositories for other subjects.

Linux, Qtile, Firefox, Bitwarden, neovim, espanso, and others. So many great tools for those willing and able to do a little digging.

Assuming I'm using Android:

• Mull or Fennec
• SkyTube
• Tusky
• Jerboa
• UntrackMe
• Orbot

• LibreWolf (+UBlock Origin, SponsorBlock, and many other extensions)
• Visual Studio Code
• VLC Media Player

Some more I did not see others mention. For Linux:

• Geany
• Python
• Meld
• Nextcloud
• Reminna and TightVNC
• Thunderbird
• Zim

For Android:

• Just Weather
• Joplin
• OpenSync
• Tasks
• OSMAnd
• Nextcloud
• SMSBackp
• Connect Bot

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.

Bitwarden-password manager Joplin - notes Kde Connect- laptop connections for file transfer, notifications etc Syncthing- file syncing

All of these are available of F-droid.