yorik

This plugin allows to place widgets on your sidebars, that fetch the contents of one or more RSS feeds, combine them by date if there is more than one, and display the thumbnail images that are included in the feeds items. You can give the widget any number of feeds, and limit the quantity of images to be displayed.
You can use any kind of RSS feed, but they must contain thumbnails (the plugin will check for, in that order, media:thumbnail tags, or enclosure tags, or, if none of these are found, an img tag inside the feed item description). If you don’t undestand a word of this, just make sure your feed carries thumbnails, otherwise all you’ll see is a “No thumbnail found” text…
You can also use this plugin from your theme templates, to display images lists anywhere else on your blog and you can easily give them a fixed size or a maximum size with CSS styling.

Image Feed Widget

A widget to display imges from RSS feeds such as twitter, flickr or youtube

Marios Alexandrou

Modifies RSS feeds so that they include pages and not just posts. Deactivating the plugin restores RSS feeds to their default state.
Including pages in your feed is particularly useful if you’re using WordPress as a CMS where pages represent a good portion of your content.
The <a href="https://infolific.com/technology/software-worth-using/include-pages-in-wordpress-rss-feeds/#pro-version" rel="nofollow ugc">pro version</a> (a lifetime license is less than $15) also allows you to:
<ol>
<li>Specify that ONLY pages are included in the feeds i.e. no posts.</li>
<li>Exclude/include posts and pages by ID.</li>
<li>Add custom post types such as WooCommerce products or Avada portfolios.</li>
</ol>

RSS Includes Pages

Some people say this plugin is useless, but they don't seem to be reading the description. If you want pages to be added to your existing feeds, this plugin will do that. No settings or configuration. Just activate and go.
Some additional features are in the pro version, but 30,000+ users find the free version useful enough to keep it active. You can't argue with the numbers! :-)



Adds Pages To Feeds Just Like It Says

Completely useless plugin. Only includes posts and pages into the RSS feed. For custom post types you have to pay $10. If you plan to make money with your plugins, please say so in the description so people don't waste their time.



Completely useless

Modifies RSS feeds so that they include pages and not just posts.

Image Feed Widget vs RSS Includes Pages