Brian S. Reed

Do you need to be able to select multiple bits of text but a repeater field is overkill? Use the tag-it field. This plugin brings uses ACF 5’s built-in Select2 library.
This field currently includes the following options:
<ul>
<li>available tags : Used as source for the autocompletion.</li>
</ul>
The jQuery UI plugin used in the first version of this plugin can be found here: https://github.com/aehlke/tag-it 
The Select2 library used in ACF 5 can be found here: http://select2.github.io/select2/
<h4>Compatibility</h4>
This ACF field type is compatible with: 
* ACF 5

Advanced Custom Fields: Tag It Field

The Tag It field for ACF using ACF 5's built-in Select2 library.

PRESSMAN

Hiroshi Sekiguchi

kazunao

This plugin adds 2 functionalities for developers who use ACF. 
1. Add a display of field details in ACF form. 
2. Add extra columns in ACF field group list.
For details, see this plugin’s setting page.

Advanced Custom Fields: Tag It Field vs Developer Tools For ACF