Add TOZNY as an authentication option to your WordPress.
Use the SecSign ID two-factor authentication on your WordPress site to enable easy and secure login using your iPhone or Android phone.
Plugin to integrate Google's products in WordPress with particular attention for the social network Google+.
Adds an extra layer of security to your WordPress Account. Same as Google 2-step verification.
OpenOTP plugin Enable two-factor authentication for your admins and/or users
Easily add Duo Security two-factor authentication to your WordPress website. Enable two-factor authentication for your admins and/or users.
Adds 2-factor authentication to your site. Use Google Authenticator or Authy enforced security.
Adds a field for accepting a Google Authenticator token to WooCommerce's login form.
Easy secure login, use password or OTP as you need. Works with Smart Crib dongles and free apps: Google Authenticator, Pledge, DS3 OATH, AuthWay Token
WordPress Auth using Google Authenticator is a simple plugin which allows authorization with Google Authenticator tokens.