aknieriem

The simplelightbox wordpress plugin brings the <a href="https://github.com/andreknieriem/simplelightbox" rel="nofollow ugc">simplelightbox</a> jquery plugin to wordpress.
You can change every option that the lightbox have in the admin panel under Design -> Simplelightbox.

Simplelightbox

Touch-friendly image lightbox for mobile and desktop without requiring jQuery

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.

Simplelightbox vs Notification Widget