Wine (Wine Is Not an Emulator)
Wine is an Open Source implementation of the Windows API on top of X and Unix.
Think of Wine as a compatibility layer for running Windows programs. Wine does not require Microsoft Windows, as it is a completely free alternative implementation of the Windows API consisting of 100% non-Microsoft code, however Wine can optionally use native Windows DLLs if they are available. Wine 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, including Linux, FreeBSD, Mac OS X, and Solaris.
More information can be read in the articles 'Why Wine is so important', and 'Debunking Wine Myths'. Please examine the Applications Database. For installation instructions and step-by-step help with running Wine, take a look at the User Guide.
Wine HQ | SourceForge
Wine is free software. The licensing terms are the http://www.gnu.org/copyleft/lesser.html
Intended Audience : Developers, End Users/Desktop
Operating System : WINE, All BSD Platforms (FreeBSD/NetBSD/OpenBSD/Apple Mac OS X), All POSIX (Linux/BSD/UNIX-like OSes), Linux, OS X, Solaris
Translations : Bulgarian, Catalan, Chinese (Simplified), Chinese (Traditional), Czech, Danish, Dutch, English, Esperanto, Finnish, French, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovak, Slovene, Spanish, Swedish, Ukrainian
User Interface : X Window System (X11)