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

multippt

Stoob

This plugin adds voting functionality for posts. This function is similar to Reddit or Digg, in that visitors can vote for and against.
Guests can also vote for posts. This functionality can be disabled as well.
A widget can be displayed showing the most voted posts on your blog, giving further exposure to your popular posts.
A brief summary of what the plugin has to offer:
<ul>
<li>Visitors can vote for your posts, if they are allowed to</li>
<li>Easy management of post votes</li>
<li>Two-way voting: People can vote for or against your posts if feature is enabled</li>
<li>Post authors can be barred from voting their own posts</li>
<li>Initial vote count feature enables the voting of posts the moment they were published</li>
<li>Fairly customizable features</li>
<li>Top voted post widget gives greater exposure of posts your readers like</li>
</ul>
<h3>Requirements</h3>
<ol>
<li>
A working WordPress install
</li>
<li>
WordPress theme must contain a call to the <code>get_header()</code> function
</li>
<li>
WordPress theme must contain the WordPress loop
</li>
</ol>
Most WordPress installs have these, so you need not worry about these.
In addition, one must have JavaScript enabled in their browsers in order to vote.
WordPress 2.8 or above is recommended for this plugin.
<h3>Customizing</h3>
Votingfunctions.php
Within <code>votingfunctions.php</code>, there are several functions that can shows other information.
<pre><code>GetVotes($post_ID): Returns the number of votes associated with the post.

UserVoted($post_ID, $user_ID): Returns TRUE if the user already voted for the post, FALSE if the user hasn't voted for the post

GetPostVotes($post_ID): Returns an array of user IDs that have voted for the post.

GetPostSinks($post_ID): Returns an array of user IDs that have voted against the post.

SortVotes(): Returns an array of post IDs and votes. The array is sorted with the post having the most votes at the top of the array.
</code></pre>

Vote It Up

The Vote It Up plugin enables visitors to vote for and against posts.

BE Stats vs Vote It Up