jim912

Outputs meta description and meta keywords in the element head. 
Notice! Current version japanese only, yet.
<h3>Links</h3>
“<a href="https://wordpress.org/extend/plugins/ps-auto-sitemap/" title="WordPress sitemap plugin">PS Auto Sitemap</a>” is a plugin automatically generates a site map page from your WordPress site. 
It is easy to install for beginners and easy to customize for experts. 
It can change the settings of the display of the lists from administration page, several neat CSS skins for the site map tree are prepared.
“<a href="https://wordpress.org/extend/plugins/ps-disable-auto-formatting/" title="WordPress formatting plugin">PS Disable Auto Formatting</a>” 
Stops the automatic forming and the HTML tag removal in the html mode of WordPress, and generates a natural paragraph and changing line.
“<a href="http://www.web-strategy.jp/" title="CMS service with WordPress" rel="nofollow ugc">CMS service with WordPress</a>” provides you service that uses WordPress as a CMS.

Meta Manager

Outputs meta description and meta keywords in the element head.

prospermtabo

Swahili Seo is a plugin developed to assist website owners to easily set seo metadata for their published pages or posts.
Swahili Seo will be fully supported and maintained until as long as is necessary.
At a glance, this plugin adds the following:
<ul>
<li>Administrators can now set description metadata for post,page or a custom post.</li>
<li>Administrators can now set keywords metadata for post,page or a custom post.</li>
</ul>

Swahili Seo

Set description and keywords metadata for your website.

Meta Manager vs Swahili Seo