ArchiScale is a free and open source Mac OS X software that allows users to convert distances using a user-defined scale, as well as determine which scale is the best to draw something on a given paper format.
LiquidMac uses a particle system to imitate liquid and responds to laptop orientation.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.
