Brandon Moeller

This plugin allows publishers to better control the width of photos that use the WordPress caption shortcode feature, when that content is displayed in RSS feed readers like Google Reader, as displayed on small-screen mobile devices.
This plugin accomplishes the same thing that adjusting the “function img_caption_shortcode” code in includes/media.php would, but allows the user to automatically update WordPress without worrying about losing these changes.
It is the author’s hope that in future releases of WordPress (post 3.3), this plugin will prove unnecessary if (hard-working, responsive-minded) WordPress core developers decide to include the fix in newer versions of the awesome great open source software we have all come to love.
The code for this plugin was inspired by code found on this page of the codex: 
<a href="https://codex.wordpress.org/Function_Reference/add_filter" rel="nofollow ugc">https://codex.wordpress.org/Function_Reference/add_filter</a>
Read more about RSS Responsive Caption on the author’s website here: 
<a href="http://brandonmoeller.com/blog/2011/12/18/rss-responsive-caption/" rel="nofollow ugc">http://brandonmoeller.com/blog/2011/12/18/rss-responsive-caption/</a>

RSS Responsive Caption

Improves WordPress caption elements so captioned images in RSS feeds responsively adjust to fit within Google Reader’s screen on Android devices.

Space X-Chimp

An easy to use, with intuitive interface, WordPress plugin that gives you the ability to easily and safely add a RSS feed icon which connected to SpecificFeeds.com by using a simple shortcode to any place (post content, page content, widget, sidebar, header, footer) of your WordPress website.
This plugin is based on, but not affiliated with, the <a href="http://www.specificfeeds.com" rel="nofollow ugc">SpecificFeeds.com</a> service. The SpecificFeeds allows your visitors to receive messages from your Blog/RSS feed by email. You can access all information (such as emails and statistics) about your subscribers if you connect your feed to a SpecificFeeds account. It’s 100% free and also has several other benefits.
This plugin give you finer control over RSS feed icon, it can be configured on the plugin settings page. You can choose one of the official RSS feed icons from SpecificFeeds.com. You can change the size of icon, and etc. If you want more options, then let us know and we will be happy to add them.
Its purpose is to provide a familiar experience to WordPress users. You don’t need to edit any file of your theme, this plugin will do everything for you. It’s just plug and play, no tedious configurations or hacks, just install, enable and start enjoying your fancy RSS feed icon. It’s that simple! In addition, your RSS feed icon will be compatible with all major browsers and work with any theme.
To use, on the plugin settings page, enter your personal link from the <a href="http://www.specificfeeds.com" rel="nofollow ugc">SpecificFeeds.com</a>, select the desired settings and click the “Save changes” button. Then you can put the [specificfeeds-icon] shortcode to any place (post content, page content, widget, sidebar, header, footer) of your WordPress website. Enjoy your fancy RSS feed icon. It’s that simple!
Features
<ul>
<li>Lightweight and fast</li>
<li>Secure code with using clear coding standards</li>
<li>Intuitive interface with many settings</li>
<li>Cross browser compatible (work smooth in any modern browser)</li>
<li>Compatible with all WordPress themes</li>
<li>RTL compatible (right to left)</li>
<li>Translation ready</li>
</ul>
Key features include
<ul>
<li>Retina support</li>
<li>Simple shortcode for displaying the SpecificFeeds icon</li>
<li>13 official icons from SpecificFeeds.com</li>
<li>Ability to set the size of icon</li>
<li>And much, much more!</li>
</ul>
Coming soon
<ul>
<li>Universal SpecificFeeds link (click-to-follow.me)</li>
</ul>
Translation
This plugin is ready for translation and has already been translated into several languages. But If your language is not available then you can make one. It is also possible that not all existing translations are up-to-date or correct, so you are welcome to make corrections. Many of plugin users would be delighted if you share your translation with the community. Thanks for your contribution!
<ul>
<li>English (default)</li>
<li>Russian (translation by <a href="https://www.instagram.com/milava_kiseleva/" rel="nofollow ugc">Milena Kiseleva</a>)</li>
<li>German (translation by Michael)</li>
<li>Spanish (translation by Ramiro Garcés and Patricio Toledo)</li>
<li>Dutch (translation by Peter Leenders)</li>
<li>French (translation by Jean-Michel, Theophil Bethel and Hervé Bouzin)</li>
</ul>
If you want to help translate this plugin, please visit the <a href="https://translate.wordpress.org/projects/wp-plugins/rss-feed-icon-for-specificfeedscom" rel="nofollow ugc">translation page</a>.
Minimum system requirements:
<ul>
<li><a href="https://wordpress.org">WordPress</a> version 4.9 or higher.</li>
<li><a href="https://secure.php.net" rel="nofollow ugc">PHP</a> version 5.6 or higher.</li>
<li><a href="https://www.mysql.com" rel="nofollow ugc">MySQL</a> version 5.0 or higher.</li>
</ul>
Recommended system requirements:
<ul>
<li><a href="https://wordpress.org">WordPress</a> version 5.0 or higher.</li>
<li><a href="https://secure.php.net" rel="nofollow ugc">PHP</a> version 7.0 or higher.</li>
<li><a href="https://www.mysql.com" rel="nofollow ugc">MySQL</a> version 5.6 or higher.</li>
</ul>
Contribution
Developing plugins is long and tedious work. If you benefit or enjoy this plugin please take the time to:
<ul>
<li><a href="https://www.spacexchimp.com/donate.html" rel="nofollow ugc">Donate</a> to support ongoing development. Your contribution would be greatly appreciated.</li>
<li><a href="https://wordpress.org/support/plugin/rss-feed-icon-for-specificfeedscom/reviews/#new-post">Rate and Review</a> this plugin.</li>
<li><a href="https://www.spacexchimp.com/contact.html" rel="nofollow ugc">Share with us</a> or view the <a href="https://github.com/ArthurGareginyan/rss-feed-icon-for-specificfeedscom" rel="nofollow ugc">GitHub Repo</a> if you have any ideas or suggestions to make this plugin better.</li>
</ul>
“RSS Feed Icon for SpecificFeeds.com” is one of the own software projects of <a href="https://www.spacexchimp.com" rel="nofollow ugc">Space X-Chimp</a>.
License
This plugin is licensed under the <a href="http://www.gnu.org/licenses/gpl-3.0.html" rel="nofollow ugc">GNU General Public License, version 3 (GPLv3)</a> and is distributed free of charge. 
Commercial licensing (e.g. for projects that can’t use an open-source license) is available upon request.
Credits
<ul>
<li>The icon of this plugin is a copyrighted image created by the <a href="https://www.spacexchimp.com" rel="nofollow ugc">Space X-Chimp</a> team. (C) All rights reserved.</li>
<li>The banner of this plugin is a copyrighted image created by the <a href="https://www.spacexchimp.com" rel="nofollow ugc">Space X-Chimp</a> team. (C) All rights reserved.</li>
<li>Unless otherwise stated, all images are created by the <a href="https://www.spacexchimp.com" rel="nofollow ugc">Space X-Chimp</a> team and are copyrighted. (C) All rights reserved.</li>
<li>The SpecificFeeds icons are the property of the <a href="http://www.specificfeeds.com" rel="nofollow ugc">SpecificFeeds.com</a>.</li>
<li><a href="http://getbootstrap.com" rel="nofollow ugc">Bootstrap</a> by Twitter, Inc. released under the <a href="https://github.com/twbs/bootstrap/blob/master/LICENSE" rel="nofollow ugc">MIT license</a>.</li>
<li><a href="https://github.com/vsn4ik/bootstrap-checkbox" rel="nofollow ugc">Bootstrap-checkbox</a> is a project of <a href="https://github.com/vsn4ik" rel="nofollow ugc">Vasily A.</a>, shared under the <a href="https://github.com/vsn4ik/bootstrap-checkbox/blob/master/LICENSE" rel="nofollow ugc">MIT license</a>.</li>
<li><a href="https://fontawesome.com" rel="nofollow ugc">Font Awesome</a> is an open source-project created by Dave Gandy. Font released under the <a href="http://scripts.sil.org/OFL" rel="nofollow ugc">SIL OFL 1.1 license</a>. Code released under the <a href="http://opensource.org/licenses/mit-license.html" rel="nofollow ugc">MIT License</a>.</li>
</ul>
Links
<ul>
<li><a href="https://www.spacexchimp.com" rel="nofollow ugc">Developer website</a></li>
<li><a href="https://github.com/ArthurGareginyan/rss-feed-icon-for-specificfeedscom" rel="nofollow ugc">Dedicated plugin page on GitHub</a></li>
<li><a href="https://wordpress.org/plugins/rss-feed-icon-for-specificfeedscom/">Dedicated plugin page on WordPress.org</a></li>
</ul>

RSS Feed Icon for SpecificFeeds.com

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RSS Responsive Caption vs RSS Feed Icon for SpecificFeeds.com