Cuckoo

Cuckoo Publisher's Description:
Cuckoo brings clock chimes back to the Mac. Play a beep on the hour---or on the half-hour, or every five minutes if you must. You can use one of Cuckoo's tasteful built-in tones, or any of your Mac's installed sounds. Cuckoo has its own volume control, so your chimes can be a subtle part of your work environment. And Cuckoo will go silent altogether if you want (for example, while iTunes is playing music or videos, or when the screen saver is active).

What's new in this version:

* Performance: Cuckoo now works harder to ensure that the chime sound (and QuickTime itself) are loaded into RAM before it's time to chime. This should help address some rare situations where chimes would be missed, or would judder and skip during playback. (Thanks to Robert, Lauren, and other users who helped me test this fix.)
* Update checking: Cuckoo now quits System Preferences when downloading an update (to ensure that the correct code is loaded when the new version is installed).
* Update checking: Stability fixes.