Chris Hardie

Debug Bar Widgets adds a new panel to the <a href="https://wordpress.org/extend/plugins/debug-bar/" rel="ugc">Debug Bar</a> that displays all registered widgets.
It could be helpful to developers who want to check whether custom widgets are registering properly.
This plugin requires that the Debug Bar plugin be installed and activated.
Want to help make this plugin better? <a href="https://github.com/ChrisHardie/debug-bar-widgets" rel="nofollow ugc">Pull requests are welcome</a>.

Debug Bar Widgets

Debug Bar Widgets adds a new panel to the Debug Bar that displays all registered widgets.

Oleg Butuzov

Debug Bar Rewrite Rules adds information about Rewrite Rules (changed via filters) 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>, but it is also can work in standalone mode (as admin tools page). Note: this plugin not able to track <code>add_rewrite_rule</code> function calls, for a reason this function is untraceable.
Once installed, you will have access to the following information:
<ul>
<li>Number of existing rewrite rules</li>
<li>List of rewrite rules</li>
<li>List of available filter hooks that can affect rewrite rules.</li>
<li>List of filters that affects rewrite rules.</li>
<li>Ability to search in rules with highlighting matches.</li>
<li>Ability to test url and see what rules can be applied to it.</li>
<li>Ability to flush rules directly from debug bar panel/tools page.</li>
</ul>

Debug Bar Rewrite Rules

This plugin makes it so easy to debug and even discover WP rewrite rules. Thanks a lot!!

Amazing plugin!

Debug Bar Rewrite Rules adds a new panel to Debug Bar that displays information about WordPress Rewrites Rules (if used).

Debug Bar Widgets vs Debug Bar Rewrite Rules