Simon Hamp

It works with Posts, Pages and Custom Post Types, giving you a really simple way to make one post refer to another. Not to be confused with automated “Related Posts” plugins.
It’s probably most handy for Custom Post Types, where you may want to display a list of similar items based on factors that are indeterminable for an automatic algorithm.
Current Limitations
<ul>
<li>It’s only a one-way reference for now</li>
<li>It’s limited to linking posts of the same type</li>
</ul>
If you need help or have ideas for more features, please use the plugin forum.
<h3>Coming Soon</h3>
<ul>
<li>Admin panel for changing some basic options</li>
<li>Linking posts of different types</li>
<li>More flexible rendering of linked posts</li>
<li>Ordering of linked posts</li>
</ul>

FS Link Posts

FS Link Posts is a simple plugin to enable you to manually associate a post with other posts you’ve created.

kapooo

WP Custom Data is a WordPress widget which adds custom fields in your WordPress site. The custom fields can be simply usable in every section of your theme or in every plugin. For example if you want to add your address to the footer but the theme has not got an address field, you can simply install the WP Custom Data, enable the plugin, go in the widget section, add the WP Custom Data in any section (no matter where), write the address in one or more rows and save. Now WordPress knows your address and you can use this fields wherever you want. Do you want to use it in the footer? Open footer.php and write the PHP code:
<pre><code>$list = get_option('wp-custom-data'); 
</code></pre>
where you want then, to display the address (the custom fields), use
<pre><code>echo $list['rowX']; 
</code></pre>
where X is the number of the row in the WP Custom Data where you have written the address.

WP Custom Data

Good plugin

Through WP Custom Data you can easily use your custom fields with any theme or plugin.

FS Link Posts vs WP Custom Data