Siteimprove

The Siteimprove CMS Plugin bridges the gap between the WordPress content management system (CMS) and the Siteimprove Intelligence Platform. Now you can scan your website for errors as soon as a page is published, allowing you to fix mistakes, optimize content, and manage your site more efficiently. 
The plugin also provides you access to Prepublish, an add-on which allows you to check your page for issues before it has been published.

Turn your most complex website challenges into manageable tasks—all from a single platform

gourl

<ul>
<li>100% Free Open Source Plugin on <a href="https://github.com/cryptoapi/Wordpress-Spelling-Notifications" rel="nofollow ugc">Github.com</a></li>
<li>The plugin allows site visitors to send reports to the webmaster / website owner about any spelling or grammatical errors which may be found by readers</li>
<li>Visitors should select text with a mouse, press Ctrl+Enter, enter comments and the webmaster will be notified about any such errors</li>
<li>Nice and simple plugin – no external websites needed and fully customizable; change the plugin language !</li>
<li>If you intend plugin to be used in a language other than English, see the <a href="https://gourl.io/languages.html" rel="nofollow ugc">Language Translations page</a></li>
<li>It is easy to integrate with any website!</li>
</ul>
Screenshots and Demo: <a href="https://gourl.io/php-spelling-notifications.html" rel="nofollow ugc">https://gourl.io/php-spelling-notifications.html</a>
Twitter: <a href="https://twitter.com/CryptocoinAPI" rel="nofollow ugc">https://twitter.com/CryptocoinAPI</a>

Webmaster Spelling Notifications

Plugin allows site visitors to send reports to the webmaster/owner about any spelling or grammatical errors. Spelling checker on your website.

Siteimprove vs Webmaster Spelling Notifications