Wine is an open-source software that enables Windows applications to run on Unix-based operating systems. It provides a development toolkit for porting Windows sources to Unix, as well as a program loader for running many unmodified Windows binaries.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.
LiquidMac uses a particle system to imitate liquid and responds to laptop orientation.
