MrXHellboy

<p>This plugin will provide you a new widget which shows the most popular posts in a unordered list.<br />
Widget options:Title, Amount of posts, Custom ul class, Custom li class, post type</p>
<h3>Development Blog</h3>
<p><a href="http://online-source.net/category/scripts/wordpress-plugins/" title="Online-Source WordPress plugins" rel="nofollow ugc">Online-Source WordPress plugins</a></p>


RobMarsh

<p>Popular Posts displays a list of your blog’s most-viewed posts. The output can be customised in <a href="http://rmarsh.com/plugins/post-options/" rel="nofollow ugc">many</a> ways.</p>
<p>This plugin <strong>requires</strong> the latest version of the <em>Post-Plugin Library:</em> <a href="https://downloads.wordpress.org/plugin/post-plugin-library.zip" rel="nofollow ugc">download it now</a>.</p>
<h3>Version History</h3>
<ul>
<li>2.6.2.0
<ul>
<li>first release — numbered to match family of post-plugins</li>
</ul>
</li>
</ul>


Popular posts widget (based on comment count) vs Popular Posts