Retrode Utility is a useful program for Mac OS X that allows users to easily edit their Retrode configuration file and install new firmware versions without needing to use text editors or the command line.
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.
