"Wine lets you run Windows software on other operating systems. With Wine, you can install and run these applications just like you would in Windows.
The Wine development release 1.1.35 is now available.
What's new in this release:
Support for OLE transacted storage.
Better certificate checking on secure connections.
More progress on the 16-bit separation.
Left 4 Dead 2 DRM really supported now.
MSI performance improvements.
64-bit fixes in debugger support.
Various bug fixes.
The source is available now."
Thanks to Linuxgames for the news.
LinuxEmu
http://linuxemu.retrofaction.com/article.php?story=20091219173426740