I personally like the following
Messenger:
Session - decentralized E2EE messenger (fork of Signal)
Signal - centralized E2EE messenger (not 100% OSS/has proprietary google components but there is a FOSS fork)
Element (previously Riot.im) - Secure decentralised chat & VoIP
System:
PCAPdroid - Monitor and record all Network traffic (without root)
App Manager - See App info (permission, tracker and much more)
Exodus - Show and lookup trackers and permissions of installed apps
Smarter Wi-Fi Manager - Set WiFi state depending on nearby cell towers
Orbot - Route traffic through TOR
Haven - Record nearby activity with your devices camera, microphone and sensors
Security:
KeePassDX - Password manager compatible with KeePass files
andOTP - 2FA TOTP authenticator
Media:
NewPipe - Lightweight YouTube frontend. No Ads or Tracking and everything is stored locally
UntrackMe - Transform Youtube, Twitter & Instagram links to their free and open source alternatives
Traveling:
OsmAnd - Global Offline and Online Map Viewing & Navigation
Games:
SuperTuxKart - Mario Kart but FOSS
Anuto TD - Simple Tower Defense
Freedoom - Doom engine source port bundled with Freedoom 1 & 2
Shattered Pixel Dungeon - A roguelike game based on Pixel Dungeon
Miscellaneous:
Aurora Store - download Playstore apps
SecScanQR - QR code scanner/generator
Survival - Manual Learn how to survive
Kakugo - Learn Japanese
Messenger:
Session - decentralized E2EE messenger (fork of Signal)
Signal - centralized E2EE messenger (not 100% OSS/has proprietary google components but there is a FOSS fork)
Element (previously Riot.im) - Secure decentralised chat & VoIP
System:
PCAPdroid - Monitor and record all Network traffic (without root)
App Manager - See App info (permission, tracker and much more)
Exodus - Show and lookup trackers and permissions of installed apps
Smarter Wi-Fi Manager - Set WiFi state depending on nearby cell towers
Orbot - Route traffic through TOR
Haven - Record nearby activity with your devices camera, microphone and sensors
Security:
KeePassDX - Password manager compatible with KeePass files
andOTP - 2FA TOTP authenticator
Media:
NewPipe - Lightweight YouTube frontend. No Ads or Tracking and everything is stored locally
UntrackMe - Transform Youtube, Twitter & Instagram links to their free and open source alternatives
Traveling:
OsmAnd - Global Offline and Online Map Viewing & Navigation
Games:
SuperTuxKart - Mario Kart but FOSS
Anuto TD - Simple Tower Defense
Freedoom - Doom engine source port bundled with Freedoom 1 & 2
Shattered Pixel Dungeon - A roguelike game based on Pixel Dungeon
Miscellaneous:
Aurora Store - download Playstore apps
SecScanQR - QR code scanner/generator
Survival - Manual Learn how to survive
Kakugo - Learn Japanese
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