horike

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Debug Bar Super Globals

Hasn't received any updates in 8 years and it STILL WORKS!

Still Works (as of WordPress 5.5)

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Dominik Schilling

Debug Bar Transients adds information about WordPress Transients to a new panel in the Debug Bar. This plugin is an extension for <a href="https://wordpress.org/extend/plugins/debug-bar/" rel="ugc">Debug Bar</a> and thus is dependent upon Debug Bar being installed for it to work properly.
Once installed, you will have access to the following information:
<ul>
<li>Number of existing transients</li>
<li>List of custom transients</li>
<li>List of core transients</li>
<li>List of custom site transients</li>
<li>List of core site transients</li>
<li>An option to delete a transient</li>
</ul>
Sounds pretty good? Install now!
This plugin is inspired by the <a href="https://wordpress.org/extend/plugins/debug-bar-cron/" rel="ugc">Debug Bar Cron</a> plugin.

Debug Bar Transients

Debug Bar Transients adds a new panel to Debug Bar that displays information about WordPress transients.

Debug Bar Super Globals vs Debug Bar Transients