borantula

Most of the plugins and even standart WordPress tabs in the admin menu are not used very often. 
With this plugin you can make rarely used items in the admin menu invisible until you need them. 
You can just toggle them whenever you need them with Toggle Extra button in the left menu.

Clean WP Admin Menu

Still works!

You can make rarely used items in the admin menu hidden.

Andrei Surdu

Provides an easy to use interface to assign colors to any term from any taxonomy. Then you can use them on front-end 
using the built-in CSS class or just by calling <code>get_term_meta</code>.

Custom Term Colors

Provides an easy to use interface to assign colors to any term from any taxonomy.

Clean WP Admin Menu vs Custom Term Colors