LTnow

This plugin was build of the fantastic Advanced Custom Fields plugin created by Elliot Condon, and was made so that referencing custom fields is easier. Here, you can see a full list of all your currently used field which is sortable by clicking on the headers, and should you need to learn more about the field or edit it, clicking the label name will take you to the field group’s page so you can do what you need to. The table sorting functionality incorporates the Tablesorter jQuery plugin by Christian Bach. Docs can be found at http://tablesorter.com/docs/.
*Note: This doesn’t display fields in your theme. It just gives you a complete list of your fields that you can reference easily and allows you to edit the field groups easily.
I tried to mark up the code for this plugin with lots of comments in hope that people can understand how it is working and expand on this functionality. Oh yeah, and all the function and variable names are based off Buster Bluth from Arrested Development.

ACF Field Display

Useful addition that displays a list of all your ACF custom fields including their Label, Name, Type, and Field Group they are associated with.

Corrado Franco

This plugin allows one to create footnotes by using markdown notation. 
It is for footnotes only. No other markdown tag is taken into account
Example:
<pre><code>I have more [^1] to say up here.

[^1]: To say down here.
</code></pre>
If used with jetpack and enabled markdown, it only shows the buttons without modifying the text content. 
Unlike jetpack-markdown, footnotes will appear in the exact point where they have been inserted. To go back to text mode click on the footnote number.
N.B 
This plugin also works with Gutenberg. But the button only appears in the Classic Editor. 
For now with Gutenberg enter the codes directly.
<h3>Configuration</h3>
No configuration is necessary.
Considering that this plugin, like others working with “markdown”, parsing the page every time I load it, I highly recommend using a caching plugin.

Blank Footnotes

Simple plugin to show footnotes using markdown notation.

ACF Field Display vs Blank Footnotes