Fortytwo’s 2FA plugin controls access to your site by sending an authentication code via SMS to your mobile phone when you register or login.

Free, simple and secure token-based authentication for your WordPress. No registration required.

This plugin enables 2-step verification using one-time password when you log in your WordPress.

Sovay secures your identity and your WordPress site logins. Authenticate once and securely access all your sites — without password hassles.

2FAS Classic — Two Factor Authentication strengthens WP-admin security by requiring an additional verification (token) code on untrusted devices.