aakash1911

WP Likes lets visitors “like” your posts on the fly. No logging in! 
Easily customizable to be used in various other scenarios. 
Shows top liked posts in sidebar widget or on a separate page.

WP likes

WP Likes lets your blog visitors 'like' your posts on the go.

Yaroslav Popov

Counter allows you to count the likes and dislikes.
Counting is carried out using AJAX.
Limitation of cheating over IP (from one IP can vote with 10 minutes intervals).
<h4>Usage</h4>
Simply place the template single.php function call inside the loop
<pre><code><?php while(have_post()) : the_post(); ?>
 <?php echo CS_Likes::show_buttons_like(); ?>
<?php endwhile; ?>
</code></pre>
Or use ID of post, if function call outside the loop
<pre><code><?php echo CS_Likes::show_buttons_like($post_id); ?>
</code></pre>
To obtain the number of likes, use the function:
<pre><code><?php $likes_count = CS_Likes::get_post_likes($post_id); ?>
</code></pre>
To obtain the number of dislikes, use the function:
<pre><code><?php $dislikes_count = CS_Likes::get_post_dislikes($post_id); ?>
</code></pre>

CS Likes Counter

Show multiple Likes Counter on your website.

WP likes vs CS Likes Counter