Simon Prosser

Debugging tool for theme authors and reviewers.
This tool intercepts all debug information and prints it all out neatly into the footer. It also checks each page for W3C validation. 
This plugin is released as a tool to aid the development of themes and plugins for WordPress and can be used to aid debugging your theme before submission to the themes directory.

Debogger

Debugging tool for theme authors and reviewers.

webdeveric

This plugin is intended for theme developers to use. It shows the current template being used to render the page, current post type, and much more.
The info is only displayed for users that have the edit_theme_options capability.
Information displayed:
<ul>
<li>Current template</li>
<li>General Information (post type, are you on the front page, etc.)</li>
<li>Additional files used. For example, header.php or footer.php</li>
<li>What sidebars are being used and what widgets are in them.</li>
<li>List of enqueued scripts and styles.</li>
</ul>
This plugin is intended for use by theme developers and it requires a standards compliant browser. This plugin will not work in IE8 or below.

What Template Am I Using

I dearly love this plugin. It's such a relief to know if you're using the right template file or not. One of my favorite plugins by far.



Such a relief

This plugin is intended for theme developers to use. It shows the current template being used to render the page, current post type, and much more.

Debogger vs What Template Am I Using