Clockwork - php dev tools integrated to your browser - server-side component
The Phoronix Test Suite open-source, cross-platform automated testing/benchmarking software.
The Developer Tools Panel for WordPress
XHProf is a function-level hierarchical profiler for PHP and has a simple HTML based user interface.
Xdebug Profiling Web Frontend in PHP
DB profiling for Laravel web and console applications.
GUI to analyze the profiling data collected using XHProf – A Hierarchical Profiler for PHP.