Aegis Authenticator - Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens...
DIGIPASS - DIGIPASS offers two-factor authentication solutions for mobile applications.
andOTP - andOTP is a two-factor authentication App for Android 4.4+
Rublon - Rublon enables your workforce to securely access your organization's networks, servers and applications via easy-to-use multi-factor authentication. Protect cloud apps, VPNs, servers, workstations, internal as well as on-premise apps.
Authenticator - Authenticator is a simple, free, and open source two-factor authentication app.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.