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

C. Johnson

<ul>
<li>Author: <a href="http://feedback.radgeek.com/contact" rel="nofollow ugc">C. Johnson</a></li>
<li>Project URI: <a href="http://feedwordpress.radgeek.com/" rel="nofollow ugc">http://feedwordpress.radgeek.com/</a></li>
<li>License: GPL 2. See License below for copyright jots and tittles.</li>
</ul>
FeedWordPress is an Atom/RSS aggregator for WordPress. It syndicates content from feeds that you choose into your WordPress weblog, and then the content it syndicates appears as a series of special posts in your WordPress posts database. If you syndicate several feeds then you can use WordPress’s posts database and templating engine as the back-end of an aggregation (“planet”) website. It was developed, originally, as a utility/hobby project, because I needed a more flexible replacement for <a href="https://web.archive.org/web/20051029095046/http://www.planetplanet.org/" rel="nofollow ugc">Planet</a> for aggregator sites that I administered.
FeedWordPress is designed with flexibility, ease of use, and ease of configuration in mind. You’ll need a working installation of WordPress (version <a href="https://codex.wordpress.org/Version_4.5" rel="nofollow ugc">4.5</a> or later), and it helps to have SFTP or FTP access to your web host. The ability to create cron jobs on your web host is helpful but not required.
<h3>Using and Customizing FeedWordPress</h3>
FeedWordPress has many options which can be accessed through the WordPress Dashboard, and a lot of functionality accessible programmatically through WordPress templates or plugins. For further documentation of the ins and outs, see the documentation at the <a href="http://feedwordpress.radgeek.com/" rel="nofollow ugc">FeedWordPress project homepage</a>.
<h3>License</h3>
The FeedWordPress plugin is copyright © 2005-2021 by Charles Johnson. It uses code derived or translated from:
<ul>
<li><a href="http://laughingmeme.org/archives/002203.html" rel="nofollow ugc">wp-rss-aggregate.php</a> by <a href="kellan@protest.net" rel="nofollow ugc">Kellan Elliot-McCrea</a></li>
<li><a href="http://www.simplepie.org/" rel="nofollow ugc">SimplePie</a> feed parser by Ryan Parman, Geoffrey Sneddon, Ryan McCue, et al.</li>
<li><a href="http://magpierss.sourceforge.net/" rel="nofollow ugc">MagpieRSS</a> feed parser by <a href="kellan@protest.net" rel="nofollow ugc">Kellan Elliot-McCrea</a></li>
<li><a href="http://diveintomark.org/projects/feed_finder/" rel="nofollow ugc">Ultra-Liberal Feed Finder</a> by <a href="mark@diveintomark.org" rel="nofollow ugc">Mark Pilgrim</a></li>
<li><a href="https://wordpress.org/" rel="ugc">WordPress Blog Tool and Publishing Platform</a></li>
</ul>
according to the terms of the <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a>.
This program is free software; you can redistribute it and/or modify it under the terms of the <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a> as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

FeedWordPress

I've been using FWP for years. I used to have several sites that relied on it for aggregating ebay stuff. However, on shared hosting, and with MANY syndicated sources, my sites often got banned for hogging the server.
The "problem" is that FWP is so excellent at what it does, I got carried away with the number of sources. 
I've been using a different aggregator for a while, but it doesn't have the flexibility of FWP: setting Category, Tags and custom fields per feed is awesome.  
Hence, I've come back to using FWP, but not using the scheduling features, and taking it easy on the number of sources.  
If you are NOT on a shared server, just ignore my comments and "fill yer boots". 

Excellent! Be careful on shared hosting, though..

I struggled with multiple RSS aggregation plugins, all of which were paid subscription plugins. I had already paid for one and after hours, I could not make it import enclosures to PowerPress. FeedWordpress took about 5 minutes to set up and worked perfectly. It also had the feature to all for reimportation of items which the paid plugin lacked. This free plugin is in every way better than the commercial alternatives.

Simple Install and Works Great

Have used FeedWP for multiple projects over the decades, for monitoring news on specific topics. Works flawlessly, and offers many valuable options. A well-designed workhorse.

Excellent and dependable.

FeedWordPress syndicates content from feeds you choose into your WordPress weblog.

Image Feed Widget vs FeedWordPress