devu

This plugin / widget substitutes the default “Links” widget. If you are a SEO specialist, you already know how much important is the rel=”nofollow” attribute in outgoing links. If you are not: links passes part of the PageRank the page has gained to their destinations. Do not let the blogroll section wasting it by donating your pagerank to external sites.
Once installed, under “Settings” -> “SEO Blogroll” you can create how many link boxes you like, each with its own title. Every link box can contain how many links you like. For each link, you can decide if it should have the nofollow attribute or not.
Once your links are ready disable the traditional “Links” widget in “Appearace” -> “Widgets” and activate the new SEO Blogroll.
If your theme supports widgets, you don’t need to change a single line of code, just install the plugin and start using it!
Please report any bug (or enhancements requests) on the plugin main page: <a href="http://www.francesco-castaldo.com/plugins-and-widgets/seo-blogroll/" title="Seo Blogroll" rel="nofollow ugc">Seo Blogroll</a>.
<h3>Arbitrary section</h3>
More information: http://www.francesco-castaldo.com/plugins-and-widgets/seo-blogroll/

SEO Blogroll

Lets you decide which blogroll links have the nofollow attribute. Don't waste link juice!

Philipp Speck

This plugin will make it possible to use tags as <code>meta keywords</code>. Under <code>Pages</code> you will find a new meta box called <code>Keywords</code>. 
By activation the plugin registrates a separate taxonomy which is independent from post tags. 
Today’s search engines don’t use <code>meta keywords</code> as a criteria at all, but who knows for what they will be good in future 😉 
For me tagging is necessary to bring pages in relation and gives me the possibility to save my tags redundant in the database.
Features
<ul>
<li>Use post tags as <code>meta keywords</code></li>
<li>Registrates own <code>taxnomy</code> for pages</li>
<li>No coding needed</li>
<li>Language support</li>
</ul>
Related Links
<ul>
<li><a href="http://www.typomedia.org/wordpress/plugins/wordpress-meta-keywords/" title="Homepage of WordPress Meta Keywords" rel="nofollow ugc">Homepage</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-keywords/changelog/" title="Changelog for WordPress Meta Keywords" rel="ugc">Changelog</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-keywords/faq/" title="FAQ for WordPress Meta Keywords" rel="ugc">Questions</a></li>
</ul>
Localization
<ul>
<li>German translation by <a href="http://www.destio.de/" title="Designstudio, Philipp Speck" rel="nofollow ugc">Designstudio, Philipp Speck</a></li>
<li>Slovak translation by Branco Radenovich</li>
</ul>
Note: 
Before installing or upgrading new plugins, please backup your database first!

WordPress Meta Keywords

This plugin gives you the ability to set Meta Keywords in WordPress. Under pages it will registrate a separate taxonomy for keywords.

SEO Blogroll vs WordPress Meta Keywords