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Aegis Authenticator - Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens...
Keeper - Keeper is a secure password manager and digital vault for businesses and individuals.
OTP Auth - The app for calculating one-time-passwords on iPhone and iPad.
andOTP - andOTP is a two-factor authentication App for Android 4.4+
Okta - Enterprise-grade identity management for all your apps, users & devices
Authenticator - Authenticator is a simple, free, and open source two-factor authentication app.