Wine is an implementation of the Windows API on top of X and Unix. It does not require Microsoft Windows, but can use native Windows DLLs if they are available. It provides both a development toolkit for porting Windows source code to Unix as well as a program loader, allowing many unmodified Windows programs to run on x86-based Unixes.
minor feature: IPHlpApi, NsiProxy, WineDbg and a few other modules converted to PE. More HID joystick work. Kernel parts of GDI moved to Win32u. More work towards Dwarf 3/4 desupport. Various.