xdark

Easy Related Posts is a WordPress plugin that displays posts related to the one a user is currently reading. 
Easy Related Posts can display related posts in main content area or in sidebars through a widget. 
Equipped with 3 eye catching fully responsive themes, supports basic modifications on them from admin panel. It also has a theme system that let you modify or write your own themes to match you personal needs. 
Through an intuitive algorithm it creates “relations” between posts and rates them based on posts categories and/or tags in a way so these ratings are as much as accurate they can be. 
Last but not least in any way, Easy Related Posts uses the best coding standards and practices with mind in security.
If you like this plugin please support the developers. You can do so using the links inside plugin settings page or by purchasing the PRO version.
PRO version can be purchased from <a href="http://erp.xdark.eu/downloads/easy-related-posts-pro/" rel="nofollow ugc">here</a>. 
To see a full list of features and compare them to the PRO version please visit <a href="http://erp.xdark.eu/version-comparison/" rel="nofollow ugc">this page</a>.
Easy Related Posts wont spam your visitors with content from other sites, ads or in any other way.
<a href="http://erp.xdark.eu/demo/" rel="nofollow ugc">See the demo</a>
This plugin requires PHP version 5.3 and above.
Features:
<ul>
<li>Easy to setup</li>
<li>Choose displayed content: excerpt length, thumbnail resizing and many more.</li>
<li>Choose if related posts should be fetched by categories or by tags</li>
<li>Exclude posts that have certain categories and/or tags from related posts</li>
<li>Prevent related posts from spawning in certain categories or tags</li>
<li>Display related posts as an eye-catching pop up block</li>
<li>Display related posts through a widget or/and in main content area</li>
<li>Options optimized before activation for most of the cases</li>
<li>Really fast, not a single database entry (I really love clean DB’s)</li>
<li>Responsive design</li>
</ul>
Please report any bugs or features you’d like to see in feature releases <a href="http://erp.xdark.eu/bugs/set_project.php?project_id=3" rel="nofollow ugc">here</a>

Easy Related Posts

Displays related posts in the end of each post or/and in sidebar through a widget

codepeople

CP Related Posts is a plugin that displays related articles on your website, manually, or by the terms in the content, title or abstract, including the tags assigned to the articles.
The relationship between posts and pages is determined in a very unique way. CP Related Posts uses an algorithm that allows you to identify the most representative terms in the content, the title and the abstract of the article, while giving more weight to those terms that match the tags explicitly added to the articles by the author.
In any website, there may be posts that are related, yet with no common terms. CP Related Posts allows to assign connections to articles manually, attributing the highest level of importance to that type of connection.
CP Related Posts offers a great versatility in displaying related posts. With CP Related Posts, you can define the number of related posts, use a specific layout to display related articles. Similarly, it is possible to decide which information to display for the related post: title, author, tags by which they relate, and importantly, an image that identifies the percentage of correspondence between the two posts.
CP Related Posts features:
<blockquote>
Allows select the number of related posts 
 Allows extract the related terms from the articles titles, contents 
 and abstracts 
 Uses an automatic algorithm to determine the weight of relationship 
 between posts 
 Allows associate posts manually (these are the most strong relationships) 
 Allows define a threshold for relations between posts 
 (Relations with a weight under the threshold are dismissed) 
 Allows to insert Google AdSense ads between related posts
</blockquote>
The base plugin, available for free, from the WordPress Plugin Directory, has all the features needed for associate website’s articles.
Premium features:
<blockquote>
Allows to use different graphics to represent the level of similarity 
 Allows to use related posts with custom post types
</blockquote>
Demo of Premium Version of Plugin
<a href="https://demos.dwbooster.com/related-posts/wp-login.php" title="Click to access the Administration Area demo" rel="nofollow ugc">https://demos.dwbooster.com/related-posts/wp-login.php</a>
<a href="https://demos.dwbooster.com/related-posts/" title="Click to access the Public Page" rel="nofollow ugc">https://demos.dwbooster.com/related-posts/</a>
If you want more information about this plugin or another one don’t doubt to visit my website:
<a href="http://wordpress.dwbooster.com" title="CodePeople WordPress Repository" rel="nofollow ugc">http://wordpress.dwbooster.com</a>
<h3>Interface</h3>
Setting up CP Related Posts
The plugin has several setup options to have a great control over related posts. Among the available configuration options you will find:
<ul>
<li>Number of related posts</li>
<li>Post types that admit related posts (the free version of plugi allows only the posts and pages)</li>
<li>Display percentage of similarity with the symbol… the option allows to select the symbol to represent the similarity between posts</li>
<li>Display related posts with a percentage of similarity bigger than. Allows to define an acceptable percentage of similarity</li>
</ul>
Display options for the related posts on the individual post/page
<ul>
<li>Display related posts in single pages (checkbox to display or hide the related posts from single pages)</li>
<li>Display featured images in related posts</li>
<li>Display percentage of similarity</li>
<li>Display excerpt of related posts</li>
<li>Display related terms between related posts</li>
<li>Display mode (select the layout for related posts)</li>
</ul>
How to display related posts in multiple-posts pages
<ul>
<li>Display related posts in multiple-posts pages</li>
<li>Display only in homepage</li>
<li>Exclude the related posts from homepage</li>
<li>Display the related posts only in specific pages</li>
<li>Exclude the related posts from specific pages</li>
<li>Display featured images in related posts</li>
<li>Display percentage of similarity</li>
<li>Display excerpt of related posts</li>
<li>Display related terms between related posts</li>
<li>Display mode (select the layout for related posts)</li>
</ul>
Tip: After the initial setup of the plugin, it is recommended to press the button “Process Previous Posts” in order to extract the terms of the posts created before installing the plugin.
How to integrate with Google AdSense
The plugin allows you to insert Google Ads between related posts. The plugin settings pages includes a new section to enable the Google AdSense, and enter the Google AdSense client and unit. In addition, the ads section allows you to configure the location of the ads into the list of related posts. Furthermore, if the Borlabs Cookies plugin is installed on your WordPress, our plugin hides the Google ads until the user accepts the Google AdSense cookies.
On the Editing screen of each post, page, or post type selected in the plugin’s settings, you will see a new form that allows you to create direct links between the post being edited and other posts on the website, as well as allowing to extract relevant terms within the text of the post and select them for use as tags of the post in question.
The way to use CP Related Post from the posts edition
After type the post’s content, press the “Get Recommended Tags” button, to extract all terms (with its weight, form the sections of post). If the user want to increase the importance of specifics terms, only is required check them.
If you want insert relevant terms that are not present in the post’s content, define it as a post’s tag.
It is possible associate posts manually. Type the terms and press the “Search” button. In the Items found section will be displayed the list of posts/pages that include the term. Select the posts/pages to associate manually.
Note: The posts associated manually represent the most strong relation.
It is possible exclude a post from the list of related posts, with only check the option: “Exclude this post from others related posts”, or hide the related posts from a post through the option: “Hide the related posts from this post”
Filters called by CP Related Posts
cprp_post_thumbnail: Requires two parameters, a link tag with the thumbnail, and the object with the post’s data.
cprp_post_title: Requires two parameters, a div tag with the post title, and the object with the post’s data.
cprp_post_percentage: Requires two parameters, a div tag with the percentage of similarity, and the object with the post’s data.
cprp_post_excerpt: Requires two parameters, the text of generated excerpt, and the object with the post’s data.
cprp_post_tags: Requires two parameters, a div tag with the tags assigned to the post, and the object with the post’s data.
cprp_content: Requires two parameters, the html tags of the generated related posts, and an array with the objects of related posts.

CP Related Posts

CP Related Posts is a plugin that displays related articles on your website, manually, or by the terms in the content, title or abstract, and tags

Easy Related Posts vs CP Related Posts