Tag Posts Widget is a light widget to show posts from a given set of tag.
Ispired by Category Posts Widget by James Lao – http://jameslao.com
Features:
<ul>
<li>Select any number of tag to be shown.</li>
<li>Add the tag browsed, while browsing the tag archives.</li>
<li>Set how many posts to show.</li>
<li>Option to append the tag names to the title.</li>
<li>Multiple widgets.</li>
</ul>

Tag Posts Widget

Adds a widget that shows the post from a given set of tags.

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.

Tag Posts Widget vs Empty Tags Remover