And it «only» reimplements an API, which is perfectly legal and will always be, no matter what these pseudo-superior-idiot-law-makers decide. Reimplementing something is legal. You have the right to build something better for yourself; you have the right to to compete, to choose ; you have the right to replace a broken or unstable bridge with one made by you. Do not worry, even if Wine were ever considered illegal, which I highly doubt, then there would surely be millions of ways of getting it -- it would only spice up the urge to reimplement the Windows API in a Free way.