ChimeX
v1.5.0
Customize alerts for the hour, half hour, and quarter hour. You may have the computer speak the time, play a sound file of your choice, play the standard alert sound, do nothing, or pick a folder and let your Mac pick the sound for you!
Shows current time and date of other time zones, next to your computer clock. Can display 1 to 9 clocks at same time.
Global Time Synchronizer is a versatile time keeping tool that has many features including the ability to modify the look of your standard desktop clock, an easy-to-use, convenient interface that uses skins to modify its appearance and much more.
Skinny clock is a freeware utility allowing you to display current time on your desktop. You can customize taskbar clock as well.
WinBoss is a system tray application that hide (all) running programs with one keyboard hit. Useful when Boss is coming, or to hide less important application from cluttering the desktop.