BlackBox is a plugin for plugin and theme developers. It collects and displays useful debug information (errors, executed queries, globals, profiler).
Glabal variables foramted using var_export() function, syntax coloring using awesome highlight.js library (75% zoom)
Profiler tab. Displays checkpoint name, time passed since profiler start and current memory usage (75% zoom)
SQL tab. Displays each query execution time and the executed queries. Syntax highlighting using highlight.js library (75% zoom)
Errors tab. Displays error type and the error message. If the error occured more then once its type is displayed as "Notice (X)" where X is the number of error occurances.