LordPretender

Similar to the original native one, this plugin let you define the range of stats to retrieve. 
Also you will be able to add the category name of the post.
Finally, this widget will only display posts (and not pages too). 
This plugin read the top 100 of posts/pages and keep only the X first POSTS (X = number defined in the widget parameters). So, you can have less posts than requested.
Jetpack is required to work. 
A wordpress account and your blog must be linked.
You can find a demo here : http://www.spoils.fr/ 
The widget is named “Articles populaires” on the sidebar.

Jetpack Popular Posts

Using Jetpack stats, this widget will display the most popular posts.

This is a simple popular posts WordPress widget for your blog. Add and day interval to specify when the posts are considered popular, the default is 365 (one year) you can also filter your post by category. Enjoy!! and please support the plugin. :@)
<ul>
<li>Languages http://xparkmedia.com/plugins/popular-widget/#languages</li>
<li>Support http://xparkmedia.com/support/plugin/popular-widget/</li>
</ul>
<h4>Features</h4>
<ul>
<li>Day range</li>
<li>Disable tabs.</li>
<li>Title length.</li>
<li>Count Display.</li>
<li>Excerpt option.</li>
<li>Excerpt length.</li>
<li>Category filter.</li>
<li>Display thumbnails.</li>
<li>Display recent comments.</li>
<li>Calculate visits or page views.</li>
<li>Custom field options for view counts.</li>
</ul>

Popular Widget

The plugin still works as expected but the support doesn't seem to be very responsive: Last reply on the Wordpress forum over 1 year ago, on the recommended official forum over 2 months ago.
More activity would be great since there are not many comparable alternatives.



Nice plugin, and some support would be great

Display the most commented or most viewed posts in a tabbed widget, filter the post by date range or by category. It also includes a tags tab.

Jetpack Popular Posts vs Popular Widget