Which is the best open source C/C++ compiler for Windows?

As now you see we have number of compilers out there like -

Some are for free and these are as follows (reference - cplusplus.com)

  1. Apple C++. It also comes with OS X on the developer tools CD.
  2. Bloodshed Dev-C++. A GCC-based (Mingw) IDE.
  3. Borland C++
  4. Cygwin (GNU C++)
  5. Digital Mars C++
  6. MINGW - "Minimalist GNU for Windows". Another GCC