Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
WinCacheGrind - WinCacheGrind is a viewer for cachegrind.out files generated by xdebug 2.
OProfile - OProfile is an open source project that includes a statistical profiler, capable of profiling all running code at low overhead.
Webgrind - Webgrind is an Xdebug profiling web frontend in PHP5.
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...