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.

Ralf Hortt

Admins have to confirm each user registration. 
A notification will be send when the account gets approved.
<h3>Usage</h3>
<ul>
<li>Go to the Confirm User Registration menu in the user tab.</li>
<li>Authenticate Users : Activate user accounts</li>
<li>Block Users : Deactivate user accounts</li>
<li>Option : Change some settings</li>
</ul>

Confirm User Registration

Admins have to confirm each user registration.

Check Last Login vs Confirm User Registration