Allan Bruford

Get notified when any of the following events occur:
<ul>
<li>A PHP error or warning occurs (monitors E_ERROR | E_PARSE | E_CORE_ERROR [see http://php.net/manual/en/errorfunc.constants.php for more information])</li>
<li>Plugin is either activated or deactivated (along with the user who performed the action)</li>
</ul>
Created by <a href="http://allanbruford.com/" rel="nofollow ugc">Allan Bruford</a> – Software Engineer at <a href="http://quickenloans.com" rel="nofollow ugc">Quicken Loans</a>, Detroit, MI

WP Activity Logger

WP Activity Logger is a plugin that monitors and notifies of certain events that take place on your site.

PasqualePuzio

This plugin sends an email to the administrator for each login. The goal of this plugin is to improve the security of your website and keep under control all the accesses to your website.
You can customize the email template and exclude from notifications the admin access.
For further information and support contact me visiting my website or the official plugin support page: 
– <a href="http://www.pasqualepuzio.it" rel="nofollow ugc">WordPress Consultant & Specialist</a> 
– <a href="http://www.pasqualepuzio.it/plugin-wordpress/login-alert/" rel="nofollow ugc">WordPress Login Alert Plugin/a></a>

Login Alert

This plugin sends an email to the administrator for each login.

WP Activity Logger vs Login Alert