GCC for 32-bit and 64-bit Windows with a real installer & updater
TDM-GCC is now hosted on Github at https://jmeubank.github.io/tdm-gcc/.
The most recent stable releases from the GCC compiler project, for 32-bit and 64-bit Windows, cleverly disguised with a real installer & updater.
ASIS (Ada Semantic Interface Specification) for GNAT on gcc. ASIS is a published international ISO standard (ISO/IEC 15291:1999). ASIS based tools are available as well.