radgh

This simple and lightweight plugin adds a “Hide from search engines” checkbox above the publish box to pages. By 
ticking this box, a meta tag will be placed into the <code><head></code> section of your page specifying that robots should 
not index the page.
By default this only applies to pages. You may extend this functionality to posts or other custom post types with a small bit of code. See the FAQ’s tab for further instructions.

Noindex Pages

Ask search engines not to index individual pages by checking an option in the publish post box.

Ivan Kristianto

Easily add Noindex and Nofollow to post, page, search and category page.
See my article <a href="http://goo.gl/500FU" rel="nofollow ugc">Easy Noindex and Nofollow WordPress Plugin</a> for details.
Full list of features:
<ul>
<li>Add nofollow and noindex in post, page, search and category page.</li>
</ul>
Other interesting stuff:
<ul>
<li>Check out the my other WordPress plugins or web development <a href="http://goo.gl/OHQNc" rel="nofollow ugc">My Portfolio</a></li>
<li>Want to optimize your WordPress blog? Check out the <a href="http://goo.gl/QedtH" rel="nofollow ugc">WordPress Optimization Article</a> Guide!</li>
</ul>

Easy Noindex And Nofollow

Easily add Noindex and Nofollow to post, page, search and category page.

Noindex Pages vs Easy Noindex And Nofollow