Cross-platform

from The Free On-line Dictionary of Computing (8 July 2008)

cross-platform

   <software, hardware> A term that describes a language,
   software application or hardware device that works on more
   than one system {platform} (e.g. {Unix}, {Microsoft Windows},
   {Macintosh}).  E.g. {Netscape Navigator}, {Java}.

   (1998-02-24)