SpeakTime is a speaking clock application for OS X 10.4 and up. Originally created when OS X didn’t support announcing the time periodically. It allows you to schedule spoken reminders in the voice and volume of your choice, show multiple desktop clocks with different time-zones, and speak the time in a more sophisticated Manner than the system clock. There is also an optional animated dock icon.
Features
It’s easy to add your own custom clock images by creating a folder of three tiff files, one for the face, and one for each hand (see the help files for details). It’s also easy to add new reminders by command-clicking on a desktop clock, or change existing ones by alt-clicking. Clocks can be on the level of the desktop, ignoring clicks, floating, or treated as normal windows, and can be up to 256 pixels wide.