nuinu

This plugin uses custom fields to allow the page title tag to be different from the actual page title.
Both meta descriptions and keywords can also be added to pages.

SEO nuinu

Customize pages and posts meta title, descriptions and keywords directly in post or page edit window in wordpress.

Zeno Popovici

Graffino

miguelibero

This plugin adds 1 button to <a href="http://tinymce.moxiecode.com/" rel="nofollow ugc">TinyMCE</a> to clear floating elements. It also adds divs to valid tags so they won’t be deleted if empty.
Originally by <a href="https://wordpress.org/plugins/tinymce-clear-buttons/" rel="ugc">Miguel Ibero</a>.

Clear Floats Button

Adds clear float button to TinyMCE Editor.

SEO nuinu vs Clear Floats Button