Rene Schmidt

Checks commentator’s website PageRank and removes nofollow attribute if its PageRank is higher than or equal to your website’s PageRank.
Purpose of this plugin is to overcome the bias caused by NoFollow. NoFollow should be used carefully to implicitly reduce comment spam that has not been filtered (e.g. Akismet) and to prevent useless internal pages (Usage Terms and such) from harming your blog’s PageRank.
The point is, many blogs apply NoFollow to ALL the web links of comment authors. This is not what NoFollow should be used for. But I do not expect bloggers to completely remove NoFollow as it may harm their PageRank. In order to break this vicious catch-22, this plugin removes NoFollow when the blog does not outrank the linked website.
Wikipedia (it’s not a blog though) uses NoFollow in a totally perverted way: ALL links to sites carrying important further information get NoFollowed.
See http://www.google.com/corporate/tech.html for more information on PageRank.
PS: PageRank values may fluctuate violently and suddenly. We all are at the mercy of Google in this regard. And there are other factors that are more important than PageRank. But it is not insignificant either.
Based on GooglePR by Emre Odabas.
Requirements: PHP5, WordPress 2.7, CURL, write access to /tmp
Attention: This is alpha grade software. Please report any bugs or suggestions to rene@reneschmidt.de, thank you.
See http://www.reneschmidt.de/veroeffentlichungen/followpagerank/ for further information.
PLEASE: if you have problems using this alpha software, please send an email to rene@reneschmidt.de with a detailed problem description. Thank you.

FollowPagerank www.reneschmidt.de

Checks commentator's website PageRank and removes nofollow attribute if its PageRank is higher than or equal to your website's PageRank.

Nick Powers

<a href="http://nickpowers.info/wordpress-plugins/grank/" rel="nofollow ugc">Google Rank Badge</a> provide a shortcode which can be used on any page and/or post. This shortcode will display a badge with your Google page rank using any color you want.
<h4>Examples</h4>
<a href="http://nickpowers.info/" rel="nofollow ugc">NickPowers.info</a> – running on my site
<h4>How to Use</h4>
<ul>
<li>In a page or post: [grank]</li>
</ul>
<h4>Setttings</h4>
<ul>
<li>Highlight color using color picker in admin settings</li>
</ul>
If you have suggestions for a new add-on, feel free to <a href="http://nickpowers.info/contact-grank/" rel="nofollow ugc">Email</a> me.
<h3>License</h3>
Copyright (C) 2012 Nick Powers
This program is free software; you can redistribute it and/or 
modify it under the terms of the GNU General Public License 
as published by the Free Software Foundation; either version 2 
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 
<a href="www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">GPL V2.0</a>
Nick Powers 
<a href="http://nickpowers.info" rel="nofollow ugc">NickPowers.info</a> 
<a href="http://nickpowers.info/contact-grank" rel="nofollow ugc">Email</a>

Google Rank Badge

Google Rank Badge will display a badge with your Google page rank via a shortcode on any page and/or post you choose.

FollowPagerank www.reneschmidt.de vs Google Rank Badge