Gorakh Shrestha

This plugin allow you to easily fetch popular post and get total view in post. Simply use <code>'orderby'=>'popularity'</code> in query string.
Add <code>'post','posts_per_page'=>-1,'orderby'=>'popularity'); 
$query = new WP_Query($args); 
?></code>
Features
<ol>
<li>Support the custom post type </li>
<li>Option page to allow popular post option in post type.(Setting > MPP Setting)</li>
<li>Can easily get total view for particular post using <code>get_view_number()</code>, <code>get_view_string()</code>. Function must be within loop. </li>
<li>To print the total view for particular post <code>the_view_number()</code> and <code>the_view_string()</code> both function are almost same but <code>the_view_string()</code> return with ‘views’ text.</li>
</ol>

Kamal Hosen

This is a simple widget like others to show your most popular posts based on views of your post. Put it in any of your widget area from your WordPress dashboard and the it will automatically show 5 most popular posts which will be visited most after the activation of the widget.So, after activation of the widget, visit a post of your website and see, it will show below the popular post title.

Popular post vs Popular Post Widget with Thumbnail