“Wine is an implementation of the Windows 3.x and Win32 APIs on
top of X and Unix. Think of Wine as a Windows compatibility layer.
Wine provides both a development toolkit (Winelib) for porting
Windows sources to Unix and a program loader, allowing unmodified
Windows 3.1/95/NT binaries to run under Intel Unixes. Wine works on
most popular Intel Unixes, including Linux, FreeBSD, and
Solaris.”