incredibledeveloperr

The plugin primarily allows a WordPress developer to extend its settings and functionality and integrate it into any type of site. For example, it can easily be extended to send a text message on virtually any WordPress action.
The plugin also includes functionality to directly send a text message to any permissible number from the plugin settings page. You can use it to SMS any of your users or just for testing purposes
Here’s a list of feature plugin provides :
<ul>
<li>Functionality to directly send a text message to any permissible number from frontend</li>
<li>Setting page which allow admin to manage Auth Token and some basic settings</li>
<li>Text message generalized which pre set by admin</li>
<li>Send a shorten URL like send promotion link</li>
</ul>
Shortcode : 
Paste shortcode where you want to display – [msg91_add_shortcodes]
Disclaimer: This plugin is not affiliated with or supported by MSG91, Inc. All logos and trademarks are the property of their respective owners.

msg91 by vasim shaikh

If you’ve ever wanted to add text messaging functionality to your website or app, Twilio is one of the best solutions on the market.

Kieran O'Shea

Henrik Schack

This plugin dramatically enhances the security of your WordPress website by adding Multi Factor Authentication (MFA) in the form of One Time Passwords (OTP) 
using <a href="https://www.yubico.com/" rel="nofollow ugc">Yubikey USB Tokens</a>. In addition to providing your username and password to login, this plugin requests an OTP code 
generated by a Yubikey, validates this via an API and only grants access if this check passes. The requirement to use an OTP can be set on a user by user 
basis and there is also a feature to require users above a certain privilege level to always use OTP.
<h3>External services</h3>
This plugin connects to an API to validate the OTP tokens generated by your security key. This is required because storing the private keys 
on the same web server as the site you wish to protect would be a security risk.
By default Yubico’s own validation server is employed, although you may setup your own server and use this instead
The default Yubico API only collects the one time password (OTP) data as provided by your security key when you login. The service validates this 
and then stores this token as “used” so it may not be replayed as part of an attack. It does not collect any other data (such as what URL is being 
authenticated using the key etc.)
This service is provided by “Yubico AB”: <a href="https://www.yubico.com/support/terms-conditions/privacy-notice/" rel="nofollow ugc">Privacy Policy</a>, <a href="https://www.yubico.com/support/terms-conditions/yubico-website-terms-conditions/" rel="nofollow ugc">Terms of Use</a>

Yubikey


Calling all regular Yubikey users! If you haven’t done so already, please take the time to review the plugin here



If you have a problem, issue or question, please post in the forums first before rating the plugin negatively – most things can be sorted out either through communication or a new release!


Reviews welcome

Enhanced login security for WordPress by requiring the presentation of a One Time Password (OTP) from a registered Yubikey

msg91 by vasim shaikh vs Yubikey