singpolyma

<ul>
<li>Detects tags from search engines, wikis, or other blogs</li>
<li>Auto-expands detected tags</li>
<li>Shows related posts based on tags</li>
<li>Provides JSON(P) feeds of tag results</li>
</ul>

FreshTags

Integrates FreshTags functionality into WordPress...

Space X-Chimp

An easy to use, with intuitive interface, WordPress plugin that gives you the ability to easily and safely add your custom meta tags to your WordPress website, directly out of the WordPress Admin Area, without the need to have an external editor.
This is a must have tool for authors and website’s owners. Its purpose is to provide a familiar experience to WordPress users. There is no need for any more editing of the files of your theme or plugins for to add custom meta tags. Just add your ID (the meta key “content” value from your verification code) or/and the URL to the social media profile of the publisher in the field on the plugin page and this plugin will do the rest for you. It will automatically add required meta tags to the head section of your website, without changing any of your theme files and without slowing down your website. This is really useful in case of updating theme or plugins, because your meta tags would never be overwritten. Your meta tags will keep on working, no matter how many times you upgrade or switch your theme and plugins.
The plugin works completely independently of the theme, so you can use it with any theme. The meta tags added via this plugin will be entirely unaffected if you edit the contents of the theme’s files, or even completely change the theme. This is really useful in case of updating theme or plugins, because your custom meta tags would never be overwritten. Your custom meta tags will keep on working, no matter how many times you upgrade or switch your theme and plugins.
Third-party services like Google Webmaster Tools, Alexa, Pinterest and Google+ require you to verify your domain. This makes sure that you are the correct owner of your blog or store before they provide their services to you. You can use this plugin to easily verify your website or domain and get a more effective and efficient sharing results. Example with Pinterest. Once you completed the verification process, people will see a checkmark next to your domain in your Pinterest profile and in pinner search results. That check mark emphasis you have confirmed the ownership of your blog or website on Pinterest. This will help your website to rank better in google and other search engines. You can easily increase your blog traffic using this plugin. “All Meta Tags” is a simple but effective SEO plugin.
Also you can use this plugin to add required meta tags such as Author, Designer, Contact, Copyright and Keywords in everywhere on your website (It adds the required meta tags to the header of all pages on your website) or the meta Description and Keywords only for Static Home Page or the meta Description and Keywords only for Blog Page.
If you want more options, then let us know and we will be happy to add them.
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>Google+ publisher link</li>
<li>Facebook publisher meta tag</li>
<li>Twitter publisher meta tag</li>
<li>Pinterest verification meta tag</li>
<li>Alexa verification meta tag</li>
<li>Norton Safe Web verification meta tag</li>
<li>Google Web Master Tools verification meta tag</li>
<li>Bing Web Master Tools verification meta tag</li>
<li>Yandex Web Master Tools verification meta tag</li>
<li>Web of Trust (WOT) verification meta tag</li>
<li>SpecificFeeds verification meta tag</li>
<li>Custom meta tags</li>
<li>Google Shopping (Merchant Center) structured data on WooCommerce product pages</li>
<li>Meta tag with name=”author”</li>
<li>Meta tag with name=”designer”</li>
<li>Meta tag with name=”contact”</li>
<li>Meta tag with name=”copyright”</li>
<li>Meta tag with name=”description” (Global, only for Static Home Page and only for Blog Page)</li>
<li>Meta tag with name=”keywords” (Global, only for Static Home Page and only for Blog Page)</li>
<li>And much, much more!</li>
</ul>
Coming soon
<ul>
<li>Google Analytics verification meta tag</li>
<li>Meta tag with name=”creator”</li>
<li>Meta tag with name=”publisher”</li>
<li>Meta tag with name=”language”</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 – Mexico (translation by Sergio Yeyo Troncoso)</li>
<li>Spanish (translation by Ramiro Garcés and Patricio Toledo)</li>
<li>Italian (translation by Stefano Tombolini)</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/all-meta-tags" 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/all-meta-tags/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/all-meta-tags" rel="nofollow ugc">GitHub Repo</a> if you have any ideas or suggestions to make this plugin better.</li>
</ul>
“All Meta Tags” 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><a href="https://codemirror.net/" rel="nofollow ugc">CodeMirror</a> is an open-source project shared under the <a href="https://codemirror.net/LICENSE" rel="nofollow ugc">MIT license</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://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/all-meta-tags" rel="nofollow ugc">Dedicated plugin page on GitHub</a></li>
<li><a href="https://wordpress.org/plugins/all-meta-tags/">Dedicated plugin page on WordPress.org</a></li>
</ul>

All Meta Tags

Easily and safely add your custom meta tags to the WordPress website's head section. This…

FreshTags vs All Meta Tags