danielpataki

Allows the selection of a registered WordPress sidebar. Also allows for null values if needed.
<h4>ACF Compatibility</h4>
This ACF field type is compatible with both ACF 4 and ACF 5.
<h4>Thanks</h4>
<ul>
<li><a href="http://www.advancedcustomfields.com/" rel="nofollow ugc">Advanced Custom Fields</a> for the awesome base plugin.</li>
<li><a href="https://www.iconfinder.com/buditanrim" rel="nofollow ugc">Buditanrim</a> for the plugin’s icon</li>
</ul>

ACF: Sidebar Selector

A field for Advanced Custom Fields which allows you to select a sidebar

Dreb Bitanghol

This field will provide you more options and flexibility on how you would like to present an instruction or message to your client’s (or site in general) admin interface.
Features:
<ul>
<li>Support PHP.</li>
<li>Option to hide label when field is displayed.</li>
</ul>
Compatible with Advanced Custom Fields:
<ul>
<li>4 (tested up to 4.4.6)</li>
<li>5 (PRO, tested up to 5.3.7)</li>
</ul>
PS: You need <a href="https://wordpress.org/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a> installed to use this.
PPS: Even more awesome if you have <a href="http://www.advancedcustomfields.com/pro/" rel="nofollow ugc">Advanced Custom Fields PRO</a> installed.
Important note: Use this with utmost care.

ACF Enhanced Message Field

Exactly what I needed

Exactly what I needed. You could improve the plugin by making the textarea field look more like an IDE, with system fonts, syntax highlights and so on.

Perfect

Awesome!!

Adds an enhanced version of the default Message field to accept PHP and certainly no wpauto().

ACF: Sidebar Selector vs ACF Enhanced Message Field