Security

IRMA
Authentication made easy, privacy-friendly, and secure

OpenContacts
A different database for contacts to keep them private only to you.

Passy - cross-platform password manager
Offline password manager with cross-platform synchronization

PCAPdroid
No-root network monitor and traffic dump tool for Android devices

i2pd
Full-featured C++ implementation of I2P client

I2P
I2P anonymous network

Rethink: DNS + Firewall
Firewall apps, monitor network activity, block malware, change DNS.

Exodus
Exodus show you trackers and permissions in apps installed on your device.

Tinc App
Android binding and user interface for the tinc mesh VPN daemon

Photok
Encrypt your photos on your device and keep them safe from others.

Flipper Mobile App
Organize data and keys on your Flipper Zero device

Cryptographic ID
Attest the trustworthiness of a device using asymmetric cryptography

Secret Space Encryptor (SSE)
File Encryption, Text Encryption (Messages, Notes, …), Secure Password Manager

OpenKeychain: Easy PGP
Encrypt your Files and Communications. Compatible with the OpenPGP Standard.

Briar
Secure Messaging, Anywhere

Safe Notes - Encrypted Notepad
Encrypted, Private note manager

sNotz
An open-source and completely offline application to manage simple notes

LessPass
Generate unique passwords for your accounts based on a master password

SshDaemon
Simpe ssh/sftp server without root.

OONI Probe
Open Observatory of Network Interference (OONI)

Hypatia
A real-time malware scanner

ANOTHERpass
Another way to manage passwords

e-Passport Reader
use the NFC chip to communicate with an electronic passport

Aegis Authenticator
Free, secure and open source 2FA app to manage tokens for your online services

Yubico Authenticator
Generate OATH codes with YubiKey NEO over NFC

OUI Lookup and Database
Find a device's manufacturer by its MAC address and browse OUIs assignments

XPrivacyLua
Really simple to use privacy manager for Marshmallow (6.0) and later

Mullvad VPN: privacy is a universal right
Protect your online privacy with a fast, trustworthy, and easy-to-use VPN.

Standard Notes
An end-to-end encrypted note-taking app for digitalists and professionals

Better Internet Tiles
Bring back Wi-Fi and mobile data tiles on Android 12 or higher