haruki8

This Simple plugin allows you to show related post link to your specify page.
Place shortcode<code>[show_posts_link]</code> in page you want to display post title.
It is necessary to make ‘a page title’ and ‘the tag of the posts’ the same character string.
Then, you can see the related posts title on specify page entry.
If you need to change the number of display related posts title, you can change 
the number in admin page.
If you can read Japanese, check this URL. More detail. 
http://www.checksite.jp/develop/simple-related-posts-in-page/

Simple Related Posts in Page

This plugin will show related post links to page if page title and post tag is equal. Use shortcode [show_posts_link].

Aaron D. Campbell

There is a <a href="http://bluedogwebservices.com/problem-related-post-plugins/" rel="nofollow ugc">problem 
with related posts plugins</a>, and Efficient Related Posts is fixing that by 
approaching the problem from a different direction and offering a very different 
solution.
Basically, current related post plugins build the list of related posts on the 
fly when the user needs to view it. Since blogs tend to be viewed far more 
often than they are updated (often hundreds of times more often), these queries 
are run way more times than they need to be. This not only wastes CPU cycles, 
but if the queries are slow (which they will be if you have 1000s of posts and 
tags) then the user gets a poor experience from slow page loads.
Efficient Related Posts moves all this effort into the admin section, finding 
related posts when a post is saved rather than when the user views it. The 
advantage is that if the query is slow it happens less often and the post writer 
is the one that waits rather than the user (which I think is WAY better).
There are limitations. For example, since the related posts are stored as post 
meta data, we only store a certain number of them (10 by default, but you can 
set it to whatever you want). This means that if you decide you need to display 
more than 10, you need to have the plugin re-process all posts. I generally 
display up to 5 related posts, but store 10 just in case I decide to display 
more in some areas. Also, since the related posts are calculated when a post is 
saved, manually adding a tag through the database will have no effect on the 
related posts, although I recommend not doing that anyway.

Efficient Related Posts

A related posts plugin that works quickly even with thousands of posts and tags.  Can be added automatically to the end of posts.

Simple Related Posts in Page vs Efficient Related Posts