Posts By Tag WordPress Plugin, provides sidebar widgets which can be used to display posts from a specific set of tags in the sidebar.
These tags can be specified in the widget or the Plugin can automatically retrieve them from the current post. You can also specify the tags using custom fields in the edit post of page screen.
You can also use shortcode or template function to display the posts.
In addition to providing comprehensive options to display posts from selected tags, the Plugin also provides the following addons which provides additional features.
Posts By Tag – Google Analytics Addon
This addon adds the ability to add Google Analytics tracking to links generated by the Posts By Tag Plugin. You can add both campaign tracking as well as click event tracking.
The cost of this addon is
$10 and you can buy it through paypal.