Marcin Kijak

After installation you can find “Noindex by path” option in the main menu. This allows you to simply add relative paths 
you need to exclude from SERPs. Add a path (including slashes from begging and the end of the string) and save the 
changes. Since this plugin is called to be “simple” you can add only one path at once, but the process is smooth 
and easy.
Plugin will add “noindex” meta tag which is an instruction for search engines that this particular page should not be indexed. 
Technically it modifies wp_head tag.

Noindex by Path

Ask search engines not to index individual pages by a relative path - which means you can set every url no matter it is a page, category listing or an …

LionScripts.com

LionScripts’ Site Maintenance & Noindex Nofollow is a very useful Site Maintenance plugin, which provides you space to work on your site, when you don’t want to make it live for the people. Apart from just blocking the rest world, the plugin also adds nofollow noindex to your wordpress site, if opted.
<h4>Plugin Features</h4>
<ul>
<li>Adds No-Index and No-Follow if opted</li>
<li>Change your site’s state into developent mode</li>
<li>Works Without any conflict on your existing plugins and themes</li>
<li>Free 24X7 Support</li>
</ul>
For all kind of support and questions, please visit http://support.lionscripts.com/ and provide detailed explaination of the respective issue.
Software specification are available at: 
http://www.lionscripts.com/product/maintenance-and-noindex-nofollow/

LionScripts: Site Maintenance & Noindex Nofollow Plugin

LionScripts' Site Maintenance & Noindex Nofollow is a very useful Site Maintenance plugin, which provides you space to work on your site, whe …

Noindex by Path vs LionScripts: Site Maintenance & Noindex Nofollow Plugin