CrossOver - Codeweavers
Don't buy a Windows license, don't reboot and don't use a Virtual Machine. Try a free trial of CrossOver to run your Windows software on Mac, Linux and Chrome OS.
Windows translation layer
MSYS2
Software Distribution and Building Platform for Windows
PlayOnLinux
PlayOnLinux will allow you to play your favorite games on Linux easily
WineHQ - Run Windows applications on Linux, BSD, Solaris and macOS
Source-code: https://gitlab.winehq.org/wine/wine