David Attard

Our highly customizable plugin / enables you to create a full screen responsive menu, with several possible effects. This menu would be an overlay over all your content, which by default makes it both very trendy (this is one of the hottest trends in web design right now) and also full reponsive, since this works well on all types of devices, from smartphones to desktops. The customization options of this menu allow you to create colors and styling for any website’s theme, since you have full color customization options. Also, with the integration of Google fonts, you are able to use any Google font, simply by specifying the name of the font. To top it all off, you can decide the direction of the the animation of the full screen menu overlay.
This is a Full Screen Responsive WordPress plugin provided by <a href="https://www.collectiveray.com/" title="Your favorite WordPress plugins" rel="nofollow ugc">CollectiveRay</a>
The full screen WordPress menu plugin offers the following features:
<ul>
<li>Shows a full screen responsive menu in WordPress</li>
<li>Integrates directly with WordPress menu functionality</li>
<li>Customizable animation (swing in from left, right, top or bottom of screen)</li>
<li>Customizable background colors</li>
<li>Customizable font (using Google font – just specify the name of the Google font)</li>
<li>Customizable font color</li>
</ul>

DC – Full Screen Responsive Menu

Good idea but not properly tested.
After install this plugin all other exist menu on site is break. finally i have delete this plugin.
This wil worked fine onyl when you are using only single menu on page.



Total Time Waste Plugin!

Very simple and straightforward plugin - love it's simplicity and it's extensive configurability!



Excellent menu - easy to use and gets the job done

This WordPress plugin makes it very easy to create a responsive full screen or overlay menu for your your WordPress website.

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.

DC – Full Screen Responsive Menu vs Notification Widget