wpgear

Ext Security. 
Dashboard & Daily-Digest about users activity. 
Now the console has a widget that displays last login users, whith: Date-Time, IP address (whith Whois info) and Device type/Browser.
<h4>Features</h4>
<ul>
<li>Even without going to the site admin area, you will be informed about the activity of the current day.</li>
<li>Any person can be a recipient of notifications. Not necessarily the Administrator.</li>
<li>Now in the Admin console you have a new widget with a list of users in order of decreasing Login time.</li>
<li>Determine and save the IP address, device and browser details, from which the was made Login. (if your server is configured correctly). For better informational content, in order to be able to determine the parameters of the User’s devices (OS, Browser, Type Device), you should have a PHP extension on the server: “Browscap”. Alternatively, you can use the Lite-Version – Plugin: “quick-browscap” from the official WP repository.</li>
<li>It is important to understand that the time to enter the site and the time of the last activity of the user are different events.</li>
<li>Displays “Login Success” Statistics for each User.</li>
<li>Displays Count “Users Activity” in Admin Bar.</li>
</ul>

Users Login Monitor

A freeware plugin, for daily-notify site administrator, about users who logged in during the day.

prontotools

zkancs

Use a simple, single shortcode to allow your visitors to login or logout depending on their current status.
The shortcode outputs an a href link for you to add in the header, footer or anywhere else on your website.
Example Shortcode:
<pre><code>[login-logout text_to_login="Login" text_to_logout="Logout" class="custom-class" redirect="/shop/"]
</code></pre>
Available Parameters:
<ul>
<li>text_to_login – The text to prompt logged-out users to log in.</li>
<li>text_to_logout – The text to prompt logged-in users to log out.</li>
<li>class – Any optional custom classes to be added to the link.</li>
<li>redirect – An optional page to redirect to after logging in/out. If not included, users will redirect to whatever page they’re on when they click the link.</li>
<li>login_url – An optional parameter that user can change the URL login page</li>
</ul>

Login Logout Shortcode

A single shortcode you can place anywhere to allow visitors to login/logout.

Users Login Monitor vs Login Logout Shortcode