James Amner

Javascript Error Reporting Client is a plugin that collects javascript errors from the visitors to your website and stores them for you to review.
This is ideally used by plugin and theme developers to help debug issues that are difficult to reproduce, or could be specific to a specific user.

Javascript Error Reporting Client

A plugin that collects javascript errors from every client and provides a dashboard for you to review these errors.

David Baumwald

Allows WordPress admin users to report issues with the back end without leaving the current page.
Features:
<ul>
<li>Fixed icon at the bottom of each admin screen to display reporting form</li>
<li>Users can enter text details regarding the issue</li>
<li>Ability for user to take a screenshot of the current view</li>
<li>Emailed submission include information about $GLOBALS, $_GET and $_POST data, current user, etc.</li>
</ul>

Admin Bug Report

A small plugin to help your WordPress clients report bugs and issues directly from the admin.

Javascript Error Reporting Client vs Admin Bug Report