Neil Batchelor

EncodeDotHost

EDH Recent Category Manager removes the manual work of curating a “recent articles” category or tag. Once configured, the plugin silently monitors your site and ensures that exactly the number of posts you choose are always assigned to your selected category or tag — no more, no less.
Whenever a post is published, unpublished, or permanently deleted, the membership is recalculated instantly. The oldest post drops out and the newest one takes its place.
Features
<ul>
<li>Settings page nested under the Posts menu in the WordPress admin.</li>
<li>Choose to manage either a Category or a Tag.</li>
<li>Choose any existing category (excluding the site default) or any existing tag as the managed term.</li>
<li>Select between 1 and 15 posts to maintain.</li>
<li>Switching taxonomy type or changing the managed term cleanly removes the plugin’s assignments from the previous one.</li>
<li>Changing the post count takes effect immediately without waiting for the next publish event.</li>
<li>No configuration files or code edits required after activation.</li>
</ul>

EDH Recent Category Manager

Automatically maintains a configurable number of your latest published posts in a chosen category or tag, in real-time.

Prasanna SP

This plugin creates a new widget which allows you to show recent posts by tags. The default Recent Posts widget in WordPress shows recent posts belonging to all categories. But this plugin gives you the option to show recent posts by tags. It is helpful if you are mainly using tags to categorize your posts.
Visit developer’s blog at <a href="http://www.prasannasp.net/" rel="nofollow ugc">prasannasp.net</a>
Support: Please post your support questions at <a href="http://forum.prasannasp.net/forum/plugin-support/wordpress-recent-posts-by-tags/" rel="nofollow ugc">Recent Posts by Tags plugin support forum</a>
Visit <a href="http://www.prasannasp.net/wordpress-plugins/" rel="nofollow ugc">this page</a> for more WordPress Plugins from the developer.

EDH Recent Category Manager vs Recent Posts by Tags