Mike Luskavets

Many users, who write a comment want to know, whether the administrator had got it or not. WP User Notifier send a message where it is written that the comment had been received and the answer would be sent as soon as possible.

WP User Notifier

Notify a user about when he sent comment or form via Contact Form 7

nabtron

WP Redirect Permalink plugin allows you to efficiently redirect your previous urls that were <code>'/postname/post_id/'</code> to only <code>'/postname/'</code> that WordPress doesn’t do automatically. This plugin respects and keeps the query variable in your url while changing the permalink structure.
If you’ve planned to change your WordPress permalink from <code>/%postname%/%postid%/</code> to only <code>/%postname%/</code> , although the old links still work fine, they’re not automatically transferred to the new one without the post id in it. This can cause serious duplicate content issue for your site (can be seen and confirmed by Google webmaster tools).
This plugin removed those duplicated content issues by redirecting the visitor to the new permalink with a 301 (permanently moved) status code.
This plugin takes care of pagination of categories and blog list and allows them to work normally.
If you have any feedback, suggestion, request or bug report please let us know at: https://nabtron.com/wp-redirect-permalink/

WP Redirect Permallink

Efficiently redirect previous urls that were '/postname/post_id/' to  '/postname/' automatically. Respects query variables.

WP User Notifier vs WP Redirect Permallink