The new WoeUSB, which is now just a command line tool, supports creating a bootable Windows USB drive from Linux with support for both Legacy PC and UEFI booting. There's also an independent Python port of WoeUSB, called WoeUSB-ng, that's actively maintained.
The tool that's used to create bootable Windows USB drives from Linux has been split into a command line program called WoeUSB, which is under active development, and a GUI called WoeUSB-frontend-wxgtk that's currently unmaintained.
