Kishore

This plugin is using Google Pagerank API to fetch the Google Pagerank of any webpage and the pages of your blog Features
<ol>
<li>Display page rank of you blog</li>
<li>Give your visitors a tool to check pagerank</li>
<li>Simple installation</li>
<li>Ajax based Pagerank checker</li>
</ol>

Kish PR

A plugin to check Pagerank of any website or webpage. Display pagerank of your blog pages

sunnyverma1984

SEO Stats Widget Plugin collects SEO statistic from various sources like Google, SemRush, Alexa, Dmoz and shows all stats in admin dashboard and sidebar widget.
<h4>Currently this plugin shows following stats</h4>
<ul>
<li>Google Pagerank</li>
<li>Google Indexed Pages</li>
<li>Google Backlinks</li>
<li>Keywords in Google</li>
<li>Keywords Cost (PPC)</li>
<li>Organic Traffic (From Google)</li>
<li>SemRush Rank</li>
<li>Alexa Rank </li>
<li>Alexa Backlink </li>
<li>Dmoz Listing </li>
<li>Website Load time</li>
</ul>
SEO Stats Widget by <a href="http://99webtools.com" title="Free Web Tools" rel="nofollow ugc">99webtools</a>

Kish PR vs SEO Stats Widget