Dennis Bareis

WordPress revisions do not normally include custom fields or taxonomies. This plugin extends revisions to include taxonomies and custom fields from PODS etc, allowing previous states to be captured, compared & restored as expected.
Usage 
There is no user interface, once installed and activated it will start 
capturing custom field and taxonomy information. The rest is stock WordPress revision functionality, except that this plugin formats the extra data into an easy to read format for display in the comparison screens.
The look for the compare screens can be changed in “settings.ini” (including turn off or changing the CSS used).
Features
<ul>
<li>
Taxonomies are saved as metadata with a key such as “$TAXONOMY:light_conditions” for the “light_conditions” custom category. The values are a list of “ID=Name” pairs. These would generally sort to the top (or close to it).
</li>
<li>
WordPress limits how the data is presented in the “Compare Revisions” screen, so the data is displayed as an alphabetically sorted list of fields and their values.
</li>
<li>
You can filter out metadata keys with one or more regular expressions if you don’t care about their values. Filtered out metadata is not saved, displayed or restored.
</li>
<li>
Some CSS is applied to the WordPress “Compare Revisions” screen which I believe makes it easier to understand, however you can disable this by renaming or deleting the CSS file (or adjusting “settings.ini”).
</li>
<li>
The unicode characters also make the output easier to read and you can change their values or remove them via “settings.ini”. For example, you can tell the difference between a repeating field and a single field with many lines.
</li>
<li>
Note that the “Restore This Revision” button restores what is on the right hand column and explains why it is greyed out for the last revision slot.
</li>
</ul>
Try it out 
<a href="https://tastewp.org/plugins/extend-revisions-for-custom-fields-and-taxonomies/" rel="nofollow ugc">Try it for free at TasteWP</a>
Reporting Issues 
Please turn on both “debug” and “info” in settings, perform the failing 
operation, and include the php log (part or all, if later specify the problem’s time as per the log)… 
Please provide screenshots if possible.

Extend Revisions for Custom Fields and Taxonomies

Possibly the only plugin that supports taxononomy revisions?

WordPress revisions do not normally include custom fields or taxonomies. This plugin extends revisions to include taxonomies and custom fields from PO …

Jupitercow

Jake Snyder

Adds a fast, simple interface for adding Social Media meta data to pages and posts. Designed to remove all of the extra stuff that you just won’t use. It is made to be straight forward for users with no confusing extras and no annoying ads. So you can enjoy using it and feel comfortable putting it before a client.
This can be used on its own, but it is more poweful when used with the <a href="https://wordpress.org/plugins/sewn-in-simple-seo/" rel="ugc">Sewn In Simple SEO</a> plugin.
<ul>
<li>Choose which post types it is added to (public post types by default)</li>
<li>Integrates nicely with the <a href="https://wordpress.org/plugins/sewn-in-simple-seo/" rel="ugc">Sewn In Simple SEO</a> plugin, so they get merged into one panel for editing</li>
</ul>
Very simple, no cruft or extra features you won’t use.
<h4>Control what post types are added</h4>
By default only pages and posts are added, but you can remove either of those and/or add more using this filter:
<pre><code>/**
 * Completely replace the post types in the XML sitemap and SEO edit functionality
 *
 * This will replace the default completely. Returns: array('news','event')
 *
 * The result is to remove 'post' and 'page' post types and to add 'news' and 
 * 'event' post types
 *
 * @param array $post_types List of post types to be added to the XML Sitemap
 * @return array $post_types Modified list of post types
 */
add_filter( 'sewn/seo/post_types', 'custom_sitemap_post_types' );
function custom_sitemap_post_types( $post_types ) {
 $post_types = array('news','event');
 return $post_types;
}
</code></pre>
<h4>Compatibility</h4>
Works with the <a href="https://wordpress.org/plugins/sewn-in-simple-seo/" rel="ugc">Sewn In Simple SEO</a> plugin.

Sewn In Simple Social Optimization

A very simple SEO interface to update Twitter and Facebook meta tags.

Extend Revisions for Custom Fields and Taxonomies vs Sewn In Simple Social Optimization