Furthermore there's a fork of Nintendont that includes support for wired Xbox 360 controllers (though it seems to not support USB storage devices; Snes9x GX by comparison lets you use USB drives and wired Xbox 360 controllers at the same time):
https://github.com/revvv/Nintendont-XBOX360
If you look at the changelog for Snes9x GX, you can see that wired Xbox 360 controller support was added to Snes9x GX in v4.4.5 on 2020-02-01:
https://wiibrew.org/wiki/Snes9x_GX#History
Furthermore there's a fork of Nintendont that includes support for wired Xbox 360 controllers (though it seems to not support USB storage devices; Snes9x GX by comparison lets you use USB drives and wired Xbox 360 controllers at the same time): https://github.com/revvv/Nintendont-XBOX360