A native Windows port of the GNU Compiler Collection (GCC)
This project is in the process of moving to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.
A complete compiler toolchain that will cross-compile ANSI C, K&R C, Pascal, Modula-2, Occam, Fortran and Basic for a number of architecture including, but not limited to, the 6500, 68000, Z80, i80, i86, i386 and PDP-11.
open source analogue of IBM OS/2 operating system