John Blackbourn

Frank.Prendergast

Removes the link from the current page in wp_list_pages(). Depending on your theme, you may need to modify your css to ensure your navigation looks well.

Remove Link to Current Page

Removes the link from the current page in wp_list_pages()

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.

Remove Link to Current Page vs Anchor Highlighter