Parallels Desktop, Wine, Lutris, WineBottler, PlayOnLinux - PlayOnMac, Windows Subsystem for Android, Windows Subsystem for Linux, Whisky, Wineskin Winery, Bottles, Vineyard, Porting Kit, Pegasus, WinApps, Goldberg Emulator, Q4wine, WineGUI, WinConn, Darling, PyWinery, Darwine, Cedega, Phoenicis are some alternatives to CrossOver.