andOTP - andOTP is a two-factor authentication App for Android 4.4+
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Aegis Authenticator - Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens...
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
OTP Auth - The app for calculating one-time-passwords on iPhone and iPad.
Duo Security - Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.