Greg - SiteOrigin

The SiteOrigin Masonry plugin gives you a widget that you can use to display your posts. It gives you a widget you can add to your <a href="https://wordpress.org/plugins/siteorigin-panels/" rel="ugc">Page Builder</a> pages or sidebar.
Take a look at the demo <a href="http://demo.siteorigin.com/origami/masonry-layout/" rel="nofollow ugc">here</a>.
<a href="http://eepurl.com/hbvhM" rel="nofollow ugc">Our newsletter</a> is a great place to stay up to date with Masonry Widget and the rest of our free WordPress products.

Masonry Widget

The SiteOrigin Masonry plugin gives you a widget that you can use to display your posts. It gives you a widget you can add to your Page Builder pages  …

zackdesign

RSS Image Widget fetches images from any RSS/Atom feed that uses enclosures and displays them in a responsive grid with a built-in lightbox. Works as both a classic widget and a Gutenberg block.
Features:
<ul>
<li>Widget + Block — Use in sidebars (classic widget) or anywhere in the block editor</li>
<li>Lightweight — No jQuery, no external CDN. Just a tiny vanilla JS lightbox (~2 KB)</li>
<li>Responsive grid — CSS Grid layout adapts to any container width</li>
<li>Lazy loading — Images use native browser lazy loading</li>
<li>Accessible — Lightbox supports keyboard navigation (Escape to close)</li>
<li>Zero configuration — Just add a feed URL and go</li>
</ul>
Upgrading from v2.x:
The Bootstrap classes (<code>row</code>, <code>col-xs-12</code>) and external Lightbox2 CDN have been replaced with clean semantic HTML, a responsive CSS Grid layout, and a bundled vanilla JS lightbox. If you had custom CSS targeting the old classes, you will need to update it to use the new <code>.rss-image-gallery</code> BEM classes.

RSS Image Widget

Display images from an RSS or Atom feed as a widget or block with a lightweight lightbox gallery.

Masonry Widget vs RSS Image Widget