LunaMenu - A menubar item that will show you information about the moon and it's phases.
Version: 1.2LunaMenu is a simple menu bar item that displays an icon of the current phase of the moon.
Operating System: Mac OS X
You can also opt to have a floating moon on your desktop, and there's a window with a detailed summary of the current moon phase.
The use of LunaMenu is completely free of charge but, of course donations are always welcomed.