This plugin removes the mandatory 'Category Base' from your category permalinks. It's
Ultimate Category Excluder allows you to quickly and easily exclude categories from your front page,
This plugin removes '/category' from your category permalinks. (e.g. /category/my-category
The Categories Images Plugin allow you to add image with category or taxonomy.
Adds a widget that shows the most recent posts from a single category.
List Category Posts allows you to list posts by category and many other parameters in a post, page o
TaxoPress enables you to manage Tags, Categories and all your WordPress taxonomy terms.
Convert existing categories to tags or tags to categories, selectively.