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.

Morgan Estes

This plugin uses the <code>hashgrid.js</code> script to overlay a CSS-customizable grid.
<h3>Credits</h3>
The <code>hashgrid.js</code> script was created by <a href="http://analog.coop" rel="nofollow ugc">Analog</a> and is licensed under Apache 2.0. Follow along at <a href="https://github.com/dotjay/hashgrid" rel="nofollow ugc">https://github.com/dotjay/hashgrid</a>.

WP Hashgrid

Overlay a customizable grid over your site to help with design layout using the hashgrid.js library.

Notification Widget vs WP Hashgrid