Bill Erickson

This is a helper plugin to allow you to build WordPress queries using WordPress.com stats.
This plugin uses the WordPress.com stats (packaged in Jetpack) to find out your most popular posts. You must be running Jetpack for this plugin to work. I recommend running Jetpack for at least 30 days to get useful data.
It asks for the 100 most popular posts over the past 30 days. This includes both posts and pages, since their stats don’t let you filter based on post type. I filter this list down to just posts and then store its ranking as post meta (‘be_stats’).
You can <a href="https://gist.github.com/billerickson/4997202" rel="nofollow ugc">write custom queries</a> to list popular posts, or use the <a href="https://wordpress.org/extend/plugins/display-posts-shortcode/" rel="ugc">Display Posts Shortcode plugin</a> to do it for you. Examples using the shortcode plugin:
[display-posts orderby=”popular”] – Lists the 10 most popular posts 
[display-posts orderby=”popular” posts_per_page=”4″] – Lists the 4 most popular posts 
[display-posts orderby=”popular” posts_per_page=”4″ tag=”basic”] – Lists the 4 most popular posts tagged “basic”
<h3>For Developers</h3>
There are a few filters available to you for customization. Refer to the plugin’s code for more information.
be_stats_args – arguments passed to WordPress.com Stats API. 
Default: array( ‘days’ => 30, ‘limit’ => 100 ) 
Example: http://www.billerickson.net/code/customize-be-stats-arguments/
be_stats_update – Conditional for determining if stats data should be saved 
Default: ‘post’ == get_post_type() 
Example: http://www.billerickson.net/code/be-stats-change-ranking-conditions/

BE Stats

Keeps track of your most popular posts for display in site

Weborithm

Host Showdown popularity contests on your site and allow your visitors to rate their favorite things!
The plugin engages your visitors attention and hooks them on your site, as long as you have fun content to serve them!
<a href="http://test.weborithm.com/hotornot" title="Hot or Not demo" rel="nofollow ugc">Check out the demo site here</a>.
Bored of just images? No problem!
The plugin allows you to show other media like embedded videos, text etc… from your Competitor content area. We have an example of how to show Videos on our test site.
With a delightfully easy setup process you can start your first contest within a couple of minutes of installation. Visit the handy <a href="http://test.weborithm.com/hotornot/documentation/" title="Hot or Not documentation" rel="nofollow ugc">documentation</a> on our test site to get started. Quick help questions are answered within the plugin too.
Features include:
<ul>
<li>Upload as many Competitors as you like.</li>
<li>Add as many Groups as you like.</li>
<li>Use the shortcode generator to show Group based contests.</li>
<li>Easily edit your Competitors.</li>
<li>Display a transition message.</li>
<li>Customize colors to your theme.</li>
<li>Easily customize displayed text.</li>
</ul>
Official Site
For more information, and to take a look at the Pro version, visit our website – <a href="http://showdownplugin.com" title="Hot or Not Script" rel="nofollow ugc">ShowDown</a>.

Showdown

Showdown popularity contests on your site!

BE Stats vs Showdown