A plugin that makes it easy to log code activity to a file.
Admin page debugger tool
Extreme Advanced debugging plugin for seeing the verbose of the verbose debug info. Tech Support, Server Admins, WordPress Developers, Plugin Develop
A plugin that helps you locate and fix issuess with your WordPress installation.
PHP Validator is a pseudo-compiler for PHP to help developers locate undefined functions and methods.
Easily find out which actions and filters are the slowest during a page load.
Display memory, page load time, average load time and query count in the footer of your site.
Adds a debug menu to the admin bar that shows query, cache, and other helpful debugging information.
WordPress plugin for Clockwork.
Speed up your blog with Easy Cache, bullet-proof and easy-to-use website caching mechanism for WordPress that just works.
This plugin adds an extra panel to Debug Bar plugin that allows developers to output custom debug info.
Debug Bar extension that adds information about the sidebars and widgets on the current page. Integrates with Content Aware Sidebars plugin.
POC Constants Definer defines WordPress constants quickly without change code.
Inpect hidden information of your WordPress websites for debugging
A simple add-on for Debug Bar that tabulates all roles and capabilities
Debug Log Parser is a tool to parse your WordPress debug-file and manage your error-handling.
Debug Bar List Script & Style Dependencies is an add-on to WordPress Debug Bar
This plugin provides an easy way to view *.log files directly in the admin panel.
An add-on for the Debug Bar plugin that will log and profile remote requests made through the HTTP API
Debug Bar Transients adds a new panel to Debug Bar that displays information about WordPress transients.
What the.. Where'd that wp_redirect come from?
Work with FirePHP, only PHP5 and a sample af values of WordPress
Show screen info of the current admin page in a new tab within the debug bar
An unobtrusive debugging tool for WordPress
Adds a system information page that include all the details on your WordPress configuration.
A simple add-on for the Debug Bar plugin to replace the button text with the database query count and time.
Load the Last Version of style.css everytime, whenever and ever. No side effects on performance.
A PHP Debugger & Logger to speed up the process of plugin development.
Display Plugin for number of queries and page loading time
This plugin integrates the great Krumo class in WordPress which allows debugging of objects and variables in a well formated and structured form.