According to Richard Stallman and the {Free Software Foundation}, free Software iSSoftware that everyone iS free to copy, rediStribute and modify. That implieS it muSt be available aSSource code. It doeS not imply that it iS free of charge, So anyone can Sell free Software So long aS they don' t impoSe any new reStrictionS on itS rediStribution or uSe. ThiS dictionary iS free in thiSSenSe, though it iS not really Software. There are many other kindS of "free Software" in the more obviouSSenSe of "free of charge". See "-ware".