likeagency

This plugin allows you to add a widget with custom text, link and a FontAwesome icon. In order for this plugin to work, please make sure you already use FontAwesome toolkit in your theme.
List of features:
<ul>
<li>Choose FontAwesome icon as an image for the button.</li>
<li>Add your own text and title for the widget.</li>
<li>Select header tag for the title.</li>
<li>Customize your FontAwesome image (position, color and background color).</li>
<li>Add custom URL to use the widget as a link.</li>
<li>Add extra button displayed below, with your own text.</li>
<li>The widget has its own stylesheet included, however with just necessary CSS to be displayed properly, so it doesn’t override the style for any theme you currently use. </li>
<li>You can also add your own CSS for this plugin via its Settings page.</li>
</ul>

Button with FontAwesome icons by LIKE.agency

This plugin allows to add a widget with custom text, link and a FontAwesome icon.

harryhe

Easy and simple create booking, shopping cart, payment plugin code, just copy and paste to your website
<h4>Widget</h4>
In the Appearance -> Widgets in WordPress 2.8 or newer you’ll find the button generator widget. After adding it to your sidebar you can enter a title for the Widget, some descriptive text that will appear above the button and specify an optional purpose and reference for the donation button to override the default settings.

Button Generator

Easy and simple create booking, shopping cart, payment plugin code, just copy and paste to your website

Button with FontAwesome icons by LIKE.agency vs Button Generator