Sampling profiler for Python programs
7 Generic TSQL Scripts to Troubleshoot SQL Performance Problems
C/C++ function instrumentation (AOP, exception/stack tracing, GC)
Support for manual parallelization of sequential C programs.
Java class profiler
C / C++ everything-memory debugger
This is sister project for osDQ which provide Restful APIs
A real Win32 extensible passive debugger
Investigo - DX9 Performance and Debugging Toolkit