Khanh

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.
Three new field types:
<ul>
<li>PostSeries: link your posts into series and display them with the [series] shortcode, also it comes with 2 widgets</li>
<li>PhotoLink: to be added</li>
<li>PostLink: to be added</li>
</ul>

PostLinks

(Beta) An extension of Fields, a custom field management plugin. PostLinks provides additional field types such as Series, PhotoLink and PostLink.

Guillermo Garcia

“Taxonomy Extra Fields” is a plugin for create and manage your own custom fields for all public taxonomies of WordPress (natives or created by the owner), directly from admin interface.
Thanks to: 
* Twig <a href="http://twig.sensiolabs.org/" rel="nofollow ugc">http://twig.sensiolabs.org/</a> 
* jQuery (Noty) v2 <a href="http://ned.im/noty/" rel="nofollow ugc">http://ned.im/noty/</a> 
* Daniel Eden for ‘animate.css’ <a href="https://daneden.github.io/animate.css/" rel="nofollow ugc">https://daneden.github.io/animate.css/</a> 
* Font Awesome <a href="http://fontawesome.io/" rel="nofollow ugc">http://fontawesome.io/</a>
<h3>Future Goals</h3>
<ul>
<li>Add new field types: geoposition…</li>
<li>Add Shortcodes and Frontend/Backend outputs</li>
<li>Add new fields options: multiple</li>
<li>Create/manage/delete new taxonomy</li>
<li>Support for non-ajax functions.</li>
<li>Add javascript validation to add/edit term form</li>
</ul>

Taxonomy Extra Fields (BETA)

Add your own custom fields to all wordpress taxonomies, easily and efficiently, directly from admin UI.

PostLinks vs Taxonomy Extra Fields (BETA)