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 give you the ability to use the <code>excerpt</code> as <code>meta description</code> for any post or page. From now you are able to control the description of your site which will be displayed on the search engine results pages. 
By activation the plugin enables the excerpt for static edit pages in admin area.
Related Links
<ul>
<li><a href="http://www.typomedia.org/wordpress/plugins/wordpress-meta-description/" title="Homepage of WordPress Meta Description" rel="nofollow ugc">Homepage</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-description/changelog/" title="Changelog for WordPress Meta Description" rel="ugc">Changelog</a></li>
<li><a href="https://wordpress.org/extend/plugins/wordpress-meta-description/faq/" title="FAQ for WordPress Meta Description" rel="ugc">Questions</a></li>
<li><a href="http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=35264#1" title="Create good meta descriptions" rel="nofollow ugc">Information</a></li>
</ul>
Note: 
Before installing or upgrading new plugins, please backup your database first!

WordPress Meta Description

With this plugin you can control the text which will be shown as description on the search engine results pages.

SEO Blogroll vs WordPress Meta Description