Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
OneLogin - On-demand SSO, directory integration, user provisioning and more
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.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.