Aby Rafa

Show meta description in your homepage, single post and page. This plugin helps you to attract visitors and boost traffic. Just plug and play. (WordPress Simple SEO – Meta Description).
If you want to know how this plugin works, right click on your page and then select view page source. You will see your meta description between the header tag.
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<li><a href="http://wp.labnul.com/plugin/one-meta-description/" rel="nofollow ugc">Plugin Homepage</a></li>
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One Meta Description

Show meta description in your homepage single post and page. (Wordpress Simple SEO - Meta Description).

Kijo

Use our plugin to display your SERP rankings right within any WordPress page or post using the popular Serpbook SEO rank tracker. 
Customise the rankings table to suit your websites branding and layout.

KIJO Serpbook API

Use our plugin to display your SERP rankings right within any WordPress page or post using the popular Serpbook SEO rank tracker.

One Meta Description vs KIJO Serpbook API