These builds are from unmodified freeciv main (development version of 3.3)
commit
189339da3f
sources.

They are built using msys2 environment
msys2-freeciv-win64-260728.7z,
available from
https://files.freeciv.org/packages/windows/msys2/
and meson based build system

Freeciv-...-win64-10-...-setup.exe ones need at least Windows 10,
the others require just Windows 8.1.

These builds include installers of
- gtk3.22-client
- sdl2-client
- sdl3-client ("win64-10" only)
- gtk4-client ("win64-10" only)
- qt6-client ("win64-10" only)
- qt5-client ("win64" only)
- ruledit (based on Qt6 on "win64-10", Qt5 on "win64")