Nice Search

Adds the canonical link to your site.

Canonical SEO Content syndication plugin adds rel=canonical tag for content syndication. The meta box is added at edit post section.

Get more information from analytics and higher rankings by utilizing canonical http headers in htaccess for non image media attachments like pdfs.

Plugin adds posibility to edit canonical URL and meta description

Quickly add the canonical meta tag and customize the url.

This plugin allows setting a default custom URL to be used as canonical. It is designed to work with Yoast SEO only.

Subscribe to Comments allows commenters on an entry to subscribe to e-mail notifications for subsequent comments.

Site operators can create detailed, hierarchical documentation for the site's authors, editors, and contributors, viewable in the WordPress admin.

Provides unofficial fixes for selected WordPress bugs, so you don't have to wait for the next WordPress core release.

Don't you hate it when plugins add top level menus between "Dashboard" and "Posts"? This shoves those to the end.

Jetpack auto-activates new modules, without asking your permission. This plugin stops that.

Allows you to display a list of the child pages of the currently viewed page.