JohnnyPea

This plugin adds registration date and last login date columns on the “Users” page. 
It also checks whether user logs in within 30 days after the registration if he does not his account is deleted – this option is disabled by default, you can change this settings on Check Last Login Settings page in Settings menu.
WARNING! The plugin is not updating the login time when logging through stored login cookies.
I am open to suggestions to improve the plugin !

Check Last Login

Simple plugin which checks user's login status and displays registration date and last login date columns on the "Users" page.

wpgear

Ext Security. 
You may not know that your site has already been hacked. 
There are many ways to add a new user to the system, without your knowledge. 
This plugin will promptly notify you that a new user has registered on your site. 
Now the console has a widget that displays all new users.
All new users will be highlighted in red until Admin confirm each of them in User-Profile. 
With the active Option: “Deny Login if User is not confirmed”, you will sleep much more peacefully.
<ul>
<li>This plugin has already helped out many times when some of our sites were hacked. But we quickly found out about it. And we were able to fast stop the problem.</li>
</ul>
<h4>Features</h4>
<ul>
<li>Automatic scanning of the Users list on a schedule, and detect unauthorized addition to the DB.</li>
<li>Notification to Administrator by e-mail.</li>
<li>The “Users” Table has a sortable Column “Confirm” ON/OFF. Users who are not Verified are highlighted in red.</li>
<li>Option: “Allow to change Settings – only for Admin”. Default = ON</li>
<li>Option: “Deny Login if User is not confirmed”. Default = ON</li>
<li><a href="https://wordpress.org/plugins/adaptive-login-action" rel="ugc">Integration with “Adaptive Login Action”</a></li>
</ul>

New Users Monitor

Ext Security. Automatic scanning of the Users list, detect unauthorized addition. Informs immediately Admin by email. Informative Widget.

Check Last Login vs New Users Monitor