Pointer Finder is a small application that helps you locate your pointer automatically. It can display concentric circles or a custom image, and offers several effects such as ringing when the pointer is moving and pulsing when not.
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.
