WordPress Nofollow Plugins for External Links
You can use a nofollow plugin for WP to use many tools to greatly increase your control over the tag of nofollow on each and every single link provided on your WP blog, on the basis of the individual and categories. They allow high quality levels of control for the purposes of search engine optimization. These include the creation of a checkbox for the nofollow tag and shortcodes, etc.
Many useful utilities of nofollow plugins
The WordPress addons for nofollow allow links that have not yet been modified in any way and ones that you feel that do not help your WP site in any way or may be spam, to stop being followed by adding the nofollow attribute that keeps the link but stops your site from following it. Modules exist to automate the entire process of tagging links as nofollow, sparing you the trouble. SEO nofollow modules enhance the SEO friendly nature of the site.
The simple and efficient nature of nofollow addons
Extensions for nofollow basically add the rel nofollow tag to links on the blogroll that are not based on the home page. The modules also function to clean unnecessary codes and correct problems of semantics. For more such interesting nofollow extensions, be sure to check out the large collection of great modules at BestPlugins.
Free WordPress Nofollow Plugins
Nofollow for External Link
Nofollow Case by Case
Quick Page or Post Redirect Plugin
Ultimate Noindex Nofollow Tool II
WP External Links
WP Nofollow Post