Greg Winiarski

BlackBox is symfony like unobstrusive debug bar attached to the top of the browser window.
How can it help you with development: 
1. instantly inspect global variables (GET, POST, COOKIE, SERVER) 
2. debug both frontend and admin area 
3. executed MySQL queries and time it took to execute each query (useful for finding slow queries) 
4. profiler for measuring performance of your plugins and themes 
5. errors occurred when loading WordPress page

BlackBox Debug Bar

Immediate feedback on a great majority of errors. Added a conditional red background to the Errors, and with this modification I have never miss even a notice anymore.

Thank you very much!

Essential plugin in my developer toolset

BlackBox is a plugin for plugin and theme developers. It collects and displays useful debug information (errors, executed queries, globals, profiler).

WP Seed

Indabug is the debug console for WordPress.

Indabug

Попробовал данный плагин и был приятно удивлен его возможностями. Query Monitor и прочие тихо курят в сторонке. Спасибо

Очень удобный способ отладки под WordPress

Indabug is the debug console for WordPress.

BlackBox Debug Bar vs Indabug