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.

Juliette Reinders Folmer

Debug Bar Taxonomies adds a new panel to the Debug Bar that displays detailed information about the registered taxonomies for your site.
<h4>Important</h4>
This plugin requires the <a href="https://wordpress.org/plugins/debug-bar/" rel="ugc">Debug Bar</a> plugin to be installed and activated.
Also note that this plugin should be used solely for debugging and/or in a development environment and is not intended for use on a production site.
If you like this plugin, please <a href="https://wordpress.org/support/view/plugin-reviews/debug-bar-taxonomies" rel="ugc">rate and/or review</a> it. If you have ideas on how to make the plugin even better or if you have found any bugs, please report these in the <a href="https://wordpress.org/support/plugin/debug-bar-taxonomies" rel="ugc">Support Forum</a> or in the <a href="https://github.com/jrfnl/Debug-Bar-Taxonomies/issues" rel="nofollow ugc">GitHub repository</a>.

Debug Bar Taxonomies

Debug Bar Taxonomies adds a new panel to the Debug Bar with detailed information about registered taxonomies. Requires "Debug Bar" plugin.

Debug Bar Super Globals vs Debug Bar Taxonomies