DjZoNe

Have you ever thought about, that putting a post in a category is so plain, and you need more sophisticated settings. Let’s say one post is more relevant to a category, than another one, so you want the more relevant posts to show up first, then the less relevant ones.
Now, it can be done easily, with Category Relevance plugin
<a href="https://downloads.wordpress.org/plugin/category-relevance.1.0.zip" rel="nofollow ugc">Download now!</a>
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Category Relevance

With this plugin, you can set a relevance value of a post against a category.

jonkemp

Adds the “nofollow” rel attribute to category links.

Nofollow Categories

Adds the "nofollow" rel attribute to category links.

Category Relevance vs Nofollow Categories