Dabuuker

Show content in a modal after page load.
Usage:
Select ‘SN Popup’ from the admin menu, then Add New. Type a name for the popup and insert any content you like. If you’re done, click Publish.
Now find a page or post you’d like to see the popup on and edit it. There should be a new metabox called ‘SN Popup’, choose the settings you want and hit Update, then view your page.
Video: https://www.youtube.com/watch?v=t6lt6v3fuEQ
To change the styling of the modal, you can override its styles in your theme’s css. Or for more advanced styling you can dequeue the default css and replace it with your own.
For reference, the default unminified version of the css is located at /plugins/sn-popup/vendor/featherlight-1.3.4/src/featherlight.css
To dequeue the old css and enqueue your own, add something like this to your functions.php:
<pre><code>add_action('wp_enqueue_scripts','remove_featherlight_css'); function remove_featherlight_css(){ wp_dequeue_style('sn-featherlight'); wp_enqueue_style('featherlight-new-css','/path-to-new-css'); } </code></pre>

Soronet Popup

neilgee

Nicola Franchini

This plugin adds the VenoBox Responsive Lightbox to links, displaying YouTube and Vimeo videos, images, galleries, iframe, Google Maps or other inline content in a responsive lightbox display.
Plugin option to open all linked images and galleries in WordPress in Lightbox mode.
The big difference compared to many others plugins like this is that VenoBox calculates the max width of the image displayed and preserves its height if is taller than the window (so in small devices you can scroll down the content, avoiding vertical microscopic resized images).
Option to disable Beaver Builder lightbox plugin.
<h3>Usage</h3>
Comprehensive usage is documented in the WP Admin > Dashboard > Settings > VenoBox Lightbox.
There are manual markup instructions for videos and iframes and automated options for images.
Ability to enable/disable VenoBox gallery for images on a per post/page/custom post type level.
Demo containing images and videos: http://themes.wpbeaches.com/venobox/

VenoBox Lightbox

I don't like the regulat Lightbox effect that skhrinks the image to fit the size of the screen. I used Responsive Lightbox and finally changer for this VenoBox. It's simple and the effect gives a better preservation of a vertical image.



Very good

This plugin adds the VenoBox Responsive Lightbox to links to display Vimeo and YouTube videos, images, galleries, iframe, inline content in a lightbox …

Soronet Popup vs VenoBox Lightbox