I use Accrescent and Obtainium for installing open source apps.
Proton VPN, just like @Onscreen5341 mentioned, has a free option. If you install it using Google Play/Aurora, you can login as a guest - without a Proton account.
I replaced SimpleLogin with Proton Pass, which contains more features and has a nicer UI.
I’ve used Organic Maps for a few years. Recently, I switched to CoMaps, which is based on Organic Maps. Both use OpenStreetMap, work offline, and don’t require any account.
I’ve used multiple apps for YouTube:
- NewPipe/Tubular/PipePipe
- Materialious/Clipious
- LibreTube
Unfortunately, YouTube is aggressively blocking Invidious, Piped, yt-dlp, and cobalt.tools, making these apps unreliable.
I recommend the Fossify suite of utility apps, which includes the following and more:
- Calculator
- Calendar
- Clock
- Contacts
- Phone
- Messages
- Notes
- Gallery
- Voice Recorder
I use these other apps:
- Camera: GrapheneOS Camera, Google Pixel Camera
- Browser: GrapheneOS Vanadium, Brave
- Weather: Breezy Weather
- Podcasts: AntennaPod
- Keyboard: FUTO Keyboard
- Text-to-speech engine: SherpaTTS