Escapepod is a useful tool for quickly quitting applications and the Dock, as well as logging out of your system. It can be activated by pressing Control-Alt-Delete, Shift-Control-Alt-Delete, or Command-Control-Alt-Delete.
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.
