Marcus Downing

Adds an “Identifier” column to the All Posts and All Pages admin panels, and to any custom post types. 
This column goes just after the Title column and shows each page’s slug, indented if necessary.

Page Identifier Column

Adds an "Identifier" column showing a post of page's slug, just after the Title column.

Dan-Lucian Stefancu

Empty Tags Remover adds a page called ‘Remove empty tags’ under ‘Posts’ admin menu where you can simply remove all the empty tags with just one click.

Empty Tags Remover

Really simple plugin. It just removes all your empty tags on demand.

Page Identifier Column vs Empty Tags Remover