Amaury Balmer

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.
Add support for taxonomy with or without hierarchical. Choose the selector type for write post.
Allow to add taxonomy to any objects registered on your installation. This plugin can be coupled with the plugin ACF to a new term meta database that allow to create on fly any field need for the taxonomy. For example, for a “Number” taxonomy, you can add fields : number ID, date of parution, screenshot, etc !
This plugin is developped on WordPress 3.5, with the constant WP_DEBUG to TRUE.
This plugin allows you to add taxonomy just by giving them a name and somes options in the backend. It then creates the taxonomy for you, takes care of the URL rewrites, provides a widget you can use to display a “taxonomy cloud” or a list of all the stuff in there, and it allows you to show the taxonomy contents at the end of posts and excerpts as well. 
To boot, it comes with a set of template tags for those who don’t mind adapting their own theme.
For full info go the <a href="https://github.com/herewithme/simple-taxonomy" rel="nofollow ugc">Simple Taxonomy</a> page.

Simple Taxonomy

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.

Tran Ngoc Tuan Anh

eLightUp

Meta Box

This tool helps you migrate custom fields from Advanced Custom Fields (ACF) to Meta Box.
Meta Box is a powerful, professional, and lightweight toolkit for developers to create custom meta boxes and custom fields for any custom post type in WordPress.
<blockquote>
Meta Box Lite 
 We recommend using <a href="https://metabox.io/lite/" rel="nofollow ugc">Meta Box Lite</a>, a feature-rich free UI version of Meta Box that provides UI and all free features for managing custom fields and dynamic content on WordPress, including post types, taxonomies, custom fields, and relationships.
</blockquote>
Switching from ACF to Meta Box gives you lots of benefits:
<ul>
<li>A wide-range of field types and options. Meta Box supports <a href="https://docs.metabox.io/field-settings/" rel="nofollow ugc">40+ built-in WordPress custom field types</a> for all your needs. You can also <a href="https://docs.metabox.io/custom-field-type/" rel="nofollow ugc">effortlessly create your own field type</a>.</li>
<li>Meta Box supports cloning fields for most field types including the WYSIWYG editor field. It also supports <a href="https://metabox.io/plugins/meta-box-group/" rel="nofollow ugc">repeatable field groups</a>.</li>
<li>Meta Box has an ultra-lightweight, yet powerful API that won’t overload your site.</li>
<li>Meta Box uses the <a href="https://docs.metabox.io/database/" rel="nofollow ugc">native WordPress meta data storage</a> and functions for ease of use and lightning-fast processing.</li>
<li>Meta Box has a ton of <a href="https://metabox.io/plugins/" rel="nofollow ugc">free and premium extensions</a> available to further extend the already powerful core Meta Box plugin so you can supercharge your custom fields in WordPress.</li>
</ul>
See more details at the <a href="https://metabox.io/meta-box-vs-acf/" rel="nofollow ugc">comparison page between ACF and Meta Box</a>.
<h3>You might also like</h3>
If you like this plugin, you might also like our other WordPress products:
<ul>
<li><a href="https://wpslimseo.com" rel="nofollow ugc">Slim SEO</a> – A fast, lightweight and full-featured SEO plugin for WordPress with minimal configuration.</li>
<li><a href="https://gretathemes.com" rel="nofollow ugc">GretaThemes</a> – Free and premium WordPress themes that clean, simple and just work.</li>
</ul>

MB ACF Migration

Migrate custom fields from Advanced Custom Fields to Meta Box.

Simple Taxonomy vs MB ACF Migration