Lukas

Age Shortcodes lets you insert the current age in years of someone or something anywhere in your WordPress site with a simple shortcode.
Use the shortcode <code>[age birthday="yyyy-mm-dd"]</code> in any post, page or widget to display the current age in years.
<h3>How it works</h3>
The <code>[age birthday="1973-10-15"]</code> year old American musician Dax Riggs is best known for fronting the band Acid Bath.
The Golden Gate Bridge was opened <code>[age birthday="1937-05-27"]</code> years ago.

Age Shortcodes

Add shortcodes for the age of someone or something in years

Luciano Castro

Anchor Highlighter is a plugin that adds a class to every anchor on your website whose href link matches the actual URL, this is useful to change the css styling of the current anchor, for example in a menu, or in the archives widget, or in any other use that you could gave it. 
You can choose the class to add in the settings-> Anchor Highlighter menu

Anchor Highlighter

This plugins adds a class to the anchors that matches the url on your browser so you can style it with css.

Age Shortcodes vs Anchor Highlighter