stesvis

Related articles by tag is a plugin that will display, after the post content, a list of links to posts that have the same tag. It is a great way to have the search engine index all your pages. 
You can tag pages as well so they can be part of the related articles. The plugin comes with a handy widget if you don’t want to use the shortcode. 
Use the shortcode [related-articles-by-tag] where you want the related articles to appear.
<h3>Known Issues</h3>
<ul>
<li>None at the moment.</li>
</ul>

Related Articles by Tag Lite

With this plugin you can add a list of links to posts having the same tag(s) of the current post.

<a href="http://www.searchekko.com" rel="nofollow ugc">SearchEkko</a> is like a “related posts” widget for your blog, but it’s only visible to readers who arrive from a search engine. It uses each visitor’s search query to find the best-matching pages on your site.
For example, imagine that a user searches “new cars” at Google, and one of your posts shows up as a top hit. They then click the link and arrive at your site. The SearchEkko widget notices that the visitor arrived from a search engine, and that their query was “new cars”. It then finds all the best pages on your site for that query, and presents them to the user.
SearchEkko helps minimize your bounce rate by presenting visitors with your best, most relevant content, helping to ensure that they’ll find what they’re looking for. It also helps drive page views by finding related posts using each visitor’s real-time intent.
Try it out today! 🙂

SearchEkko

SearchEkko is a "related posts" widget that uses visitors' search referral terms to find and present your best-matching posts.

Related Articles by Tag Lite vs SearchEkko