Alex Jose

linjo13

NoFollow Link adds a button to the post editor to add nofollow attribute to any links in the post. Select a link in the post and click the No Follow button, the nofollow attribute will be added to the link.

NoFollow Link

NoFollow Link adds a button to the post editor to add nofollow attribute to any links in the post.

Thamizhchelvan

Asad Zulfahri

patrickcurl

The NoLiP plugin enables you to add the “nofollow” attribute into links in a post within a specified category. This plugin is useful if you are doing sponsored posts. You can set the plugin to add the “nofollow” attribute for posts older than “X” days.
Originally the Nofollow Links in Post Plugin found here: 
http://www.themiak.com/wp-plugins/nofollow-links-in-posts/

NoLiP – Nofollow Links in Posts Reborn

Adds the rel="nofollow" to links in posts within a selected category. Useful for sponsored posts.

NoFollow Link vs NoLiP – Nofollow Links in Posts Reborn