Wineskin (Wine wrapper for use in Mac OS X)

"Wineskin is a tool used to make ports of Windows software to Mac OS X. The ports are in the form of normal Mac application bundle wrappers. It works like a wrapper around the Windows software, and you can share just the wrappers if you choose. Best of all, its free! Make ports/wrappers to share with others, make ports of your own open source, free, or commercial software, or just make a port for yourself! Why install and use Windows if you don’t need to?"