William P. Davis

This plugin will automatically links to terms in your content to that term’s page. Can be used for tags, categories and custom taxonomies. Based on Chen Ju’s Automatic Tag Links.
The plugin will only match full words, so if you have a term called “World” and use the word “worldwide” it will link not link world. Furthermore, if you have the term Worldwide Imports it will link the longer term first.
<h3>Upcoming features</h3>
<ul>
<li>A better way to store terms in order to ensure better performance and more consistent linking.</li>
<li>Only link terms with more than x posts.</li>
</ul>

Terms to Links

This plugin will automatically link term names in your content to that term's detail page.

Erwan Guillon

Activate the plugin and add some code to your functions.php
Basic function :
<ul>
<li>AyTermMeta::addMeta($term, $name, $label, $type = ‘input’, $description = ”, $options = array()) {} Generate all meta management in WordPress Admin</li>
</ul>
Advanced functions :
You can use term_meta functions similar to post_meta function to add / update / get / delete metas
<ul>
<li>function add_term_meta( $term_id, $meta_key, $meta_value, $unique = false ) {}</li>
<li>function update_term_meta( $term_id, $meta_key, $meta_value, $prev_value = ” ) {}</li>
<li>function get_term_meta( $term_id, $key = ”, $single = false ) {}</li>
<li>function delete_term_meta( $term_id, $meta_key, $meta_value = ” ) {}</li>
</ul>

AY Term Meta

Add some meta to your terms like tags, categories or custom taxonomies

Terms to Links vs AY Term Meta