Marvie Pons

Rel Nofollow Categories is a plugin which adds nofollow attribute to categories generated by the_category and wp_list_categories throughout the blog.
Adds Nofollows to category links and an option to noindex the category pages.
Plugin by <a href="http://tutskid.com/" rel="nofollow ugc">How To | Tutorials | TutsKid</a>.
<h3>License</h3>
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 3 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 Rel Nofollow Categories. If not, see <a href="http://www.gnu.org/licenses/" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

Rel Nofollow Categories

Janine

This plugin adds and removes link relations such as nofollow and noreferrer to your external links. Furthermore, indication of external links by adding a custom icon to the link text. This plugin also adds automatically that external links will be opened in a new tab.
<ul>
<li>Add rel=nofollow for all the external links of your posts / pages / menus</li>
<li>Add target=_blank for all the external links of your posts / pages / menus</li>
<li>Exclude domains from addding rel=nofollow for the selected external links</li>
<li>Remove rel=noreferrer for all the external links of your posts / pages</li>
<li>Activate custom icon to indicate external links</li>
<li>Choose from different icons to mark links</li>
<li>Superscript Icon or regular size</li>
<li>Add custom CSS class to icon</li>
</ul>
The plugin is written by Janine, and is based on CyberNetikz Nofollow for external links plugin.

Customize External Links and add Icon

Customize link attributes, such as nofollow links, remove noreferrer, add icons to indicate external links

Rel Nofollow Categories vs Customize External Links and add Icon