illusori

This plugin embeds the <a href="http://sta.sh/muro" rel="nofollow ugc">deviantART muro</a> HTML5 drawing application into your WordPres installation, allowing you to:
<ul>
<li>Draw in your browser to create new images in your Media Library.</li>
<li>Allow your users to draw in their browser to add images to their comments.</li>
<li>Embed deviantART muro with a preselected image within your articles, for example to run a competition or ask for feedback on an artwork you’ve drawn.</li>
</ul>
<h3>Contributing</h3>
This plugin is open source, contributions are welcome.
Just fork https://github.com/deviantART/embedded-deviantART-muro-wordpress on <a href="http://github.com" rel="nofollow ugc">GitHub</a> and send us a pull request with your changes.

deviantART muro

Embed deviantART muro, the HTML5 drawing application, for image drawing in your Media Library, in articles, and for drawing in comments.

Archivarix

Archivarix External Images Importer will scan your posts and pages for external urls in src/srcset attribute for all img tags. Based on configured settings it can:
<ul>
<li>Download images from their external locations</li>
<li>Download images from Internet Archive (Wayback Machine)</li>
</ul>
You can choose what to do with images that could not be retrieved from external sources.
For further information and instructions please see <a href="https://archivarix.com/en/wordpress/" rel="nofollow ugc">Archivarix WP Plugin</a>

Archivarix External Images Importer

Works great!
I imported several posts into a site running WordPress 5.9.3 with Gutenberg and the Archivarix External Images Importer plugin imported the external images without any issues. I've tested a few other image importer plugins but none of them had the ability to scan a site and import from existing content like this one does.

Works with Gutenberg

Import external images in posts and pages from its original external sources or Web Archive if original source is unavailable.

deviantART muro vs Archivarix External Images Importer