TDM-GCC
TDM-GCC is a compiler suite for Microsoft Windows.
It combines the most recent stable release of the GCC toolset, a few patches for Windows-friendliness, and the Free and [open-source software|free and open-source] MinGW runtime APIs to create an open-source alternative to Microsoft's compiler and platform SDK. It is able to build 32-bit or 64-bit binaries, for any version of Windows since Windows 98.
TDM-GCC is a redistribution of components that are freely available elsewhere. A large difference is that it changes the default GCC libraries to be statically linked, and use a shared memory region for exception handling.
As of October 2025, Development seems to have ceased since 2021.