Hiram

You can use this plugin to show up notice on article / page. Like “Cookie Notice” or “Adult Content Notice”.
Plugin Features
<ul>
<li>Free for everyone.</li>
<li>Show popup notice on post / author archive page.</li>
<li>Insert advertisement to notice box.</li>
<li>Custo notice box n title / content / button.</li>
<li>Custom decline button URL.</li>
</ul>

WP Content Restriction

This plugin can avoid teen (under 18) reading adult content.
Online use example: https://www.kocpc.com.tw/archives/69797



Good for adult content projection

bradvin

fooplugins

steveush

FooBox adds a lightbox to your WordPress site, so images are loaded in a modal or popup instead of redirecting your visitors away from your site.
Some people often refer to a lightbox as an “Image Zoom” effect. It’s really just a modal overlay or popup that showcases your images.
FooBox was the first lightbox to take responsive layout seriously. Not only does it scale images to look better on phones, but it rearranges it’s button controls to look great in both portrait or landscape orientation.
Add a modal popup to your website images with no setup. FooBox will automatically add modals to WordPress galleries, WordPress images with captions, and attachment images.
Works with most image gallery plugins, but works best with our <a href="https://fooplugins.com/foogallery-wordpress-gallery-plugin/" rel="nofollow ugc">FooGallery Gallery WordPress Plugin</a>.
FULL GUTENBERG SUPPORT
Within Gutenberg, FooBox lightbox will automatically add a modal popup to images and galleries that have the “Link To” setting set to “Media File”. 
Image captions set in the editor are also automatically picked up in the FooBox modal popup.
FooBox Image Lightbox Features:
<ul>
<li>Responsive lightbox design</li>
<li>Modern lightbox design</li>
<li>Zero configuration!</li>
<li>Works with WordPress galleries</li>
<li>Works with WordPress captioned images</li>
<li>Control when to exclude / include FooBox JS & CSS assets</li>
</ul>
Includes a 7-day free trial of FooBox Pro Lightbox!
You can try the PRO version for free for 7 days.
<a href="https://fooplugins.com/foobox/?utm_source=fooboxfreeplugin&utm_medium=fooboxfreeprolink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">FooBox PRO</a> Features:
<ul>
<li>Social sharing (10+ networks)</li>
<li>Video lightbox support</li>
<li>HTML lightbox support</li>
<li>iFrame support</li>
<li>Deeplinking</li>
<li>Fullscreen and slideshow modes</li>
<li>Glass lightbox theme (including custom color pickers)</li>
<li>Metro lightbox theme</li>
<li>Flat lightbox theme</li>
<li>5 color schemes, 12 button icons and 11 loader icons</li>
<li>12 animation effects</li>
<li>85+ settings to customize</li>
</ul>
<a href="https://fooplugins.com/foobox/?utm_source=fooboxfreeplugin&utm_medium=fooboxfreeprolink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">FooBox PRO</a> Works With:
<ul>
<li><a href="https://fooplugins.com/foogallery-wordpress-gallery-plugin/" rel="nofollow ugc">The Best Image Gallery Plugin for WordPress</a></li>
<li>NextGen</li>
<li><a href="https://codecanyon.net/item/justified-image-grid-premium-wordpress-gallery/2594251" rel="nofollow ugc">Justified Image Grid</a></li>
<li>Envira Gallery</li>
<li>WooCommerce product images (Works with WooCommerce v3+)</li>
<li>JetPack Tiled Gallery</li>
<li>AutOptimize</li>
</ul>
Check out the <a href="https://fooplugins.com/foobox-feature-comparison/?utm_source=fooboxfreeplugin&utm_medium=fooboxcomparelink&utm_campaign=foobox_free_wprepo" rel="nofollow ugc">full feature comparison</a>.
Complete FooBox Asset Control
By default, FooBox lightbox includes javascript and stylesheet assets into all your pages. We do this, because we do not know if the page content contains media or not. 
If you want more control over when FooBox assets are included, you can now exclude the assets by default, by enabling a setting. Then on each page, you can choose to include them when required. 
Alternatively, you can leave the setting disabled, and then choose to exclude the FooBox assets from particular pages. A new metabox is now available when editing your pages or posts. 
This new feature was only available in the PRO version beforehand, but we feel control over your website performance is something you should not have to pay for. Enjoy!
Translations
<ul>
<li><a href="https://www.webhostinghub.com/" rel="nofollow ugc">Serbo-Croatian by Borisa Djuraskovic</a></li>
</ul>

Lightbox & Modal Popup WordPress Plugin – FooBox


it´s easy to get going right after the install! not too complex as I am needing it for "single" images to lightbox! really excellent!!!!!!


wonderful!

stops working after 7 days


FooBox works great ouf of the box (pun intended) and is well-suited for sites that need a quick image lightbox plugin that plays well with others.



The default lightbox theme provided is professionally made and well-suited for showcasing screenshots, portfolio items, photography, and more.



If you need more layout choices and compatibility with even the peskiest lightbox plugins, please check out Pro, as it's the only license I don't hesitate to renew.


FooBox is fantastic

A responsive image lightbox for WordPress galleries, WordPress attachments & FooGallery

WP Content Restriction vs Lightbox & Modal Popup WordPress Plugin – FooBox