Konstantin Agafonov

This plugin provides a clean, lightweight solution for creating popups in WordPress. It uses a custom post type to manage popups and displays them in the site footer. Popups can be triggered via anchor links or JavaScript.
<h4>Features</h4>
<ul>
<li>Create unlimited popups via WordPress admin</li>
<li>Custom post type for easy management</li>
<li>Support for shortcodes (Contact Form 7, etc.)</li>
<li>Responsive design</li>
<li>Click outside or × button to close</li>
<li>URL hash-based triggering</li>
<li>Scroll lock when popup is open</li>
</ul>
<h4>Support</h4>
If you want to buy me a coffee, write me a message to kagafonov2222@yandex.ru

YAP – Yet Another Popups

A simple plugin for creating and managing popup windows on your WordPress site.

AbroadPal

Notification Widget offers you the ability to insert and fully customize an overlay widget for your website, blog, etc.
You can easily change all settings of the entire overlay in the Dashboard. 
There are the following settings for you to change:
Overlay Style: 
– colors of bar and content frame background 
– text of the content frame and bar
Overlay Layout: 
– distance of the close button to the borders 
– size of the close button 
– height of the bar 
– height and width of the content frame 
– widget position (X- and Y-axis)

Notification Widget

Notification Widget is a overlay allowing you to get a individual overlay for your website.

YAP – Yet Another Popups vs Notification Widget