Kext Helper is a free Mac application that provides a graphical user interface that makes it easy to install kernel extensions. If you already have a file with the same name as what you are installing, the old one will be moved to a folder called "Backup Extensions" on the root of your system disk.
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.
