Spacious is a tool for improving mouse navigation capabilities in OS X Spaces and Apps. It allows you to use gestures, screen borders, and a 2D mouse wheel to navigate. Pressing the middle mouse button brings up the Gesture Puck, which can be used to trigger actions such as switching Spaces or accessing Mission Control.
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.
