useful open source libraries/projects on Windows

Question

Which open-source projects do you feel C/C++ Windows developers should be aware of?

Boost Libraries: generic library (smart pointers, command line parsing, threads, formatting, etc)

Postgresql: full-feature SQL database.

MediaInfo: provides information about audio/video files.

Answer 1

CodeCogs is great for scientific, mathematical, and engineering applications:

#include <codecogs/stats/moments/kurtosis.h>
#include <iostream>

int main()
{
  float x[5] = {3.4 , 7.1 , 1.5 , 8.6 , 4.9};
  double kurt = Stats::Moments::kurtosis<float>(5, x);
  // "Population kurtosis is: -0.928457"
  std::cout << "Population kurtosis is: " << kurt << std::endl;
  return 0;
}

Answer 2

Open Source Softwares for Windows Platforms. It list number of Open Source Softwares for Windows Platform.