Best FOSS privacy tools for Linux and android?

Currently using: Aeris, BitWarden, VeraCrypt, GPG etc. What are your standard and can't live without privacy/security apps?

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  • 2FA: Aegis
  • Podcasts: AntennaPod
  • Passwords: Bitwarden
  • Email: ProtonMail
  • Browser: Firefox (and Fennec for Android)
  • Search: DuckDuckGo
  • Notes: Joplin
  • YouTube: Piped (and LibreTube for Android)
  • Maps: MagicEarth
  • Streaming Music: ViMusic
  • File Transfer: Snapdrop and Syncthing
  • Messaging: Signal
  • VPN: ProtonVPN
  • Read It Later: Wallabag

But duckduckgo is not open source project.