I am aware that in Unity we can add world time by clicking on time bar. However, it's still a list of locations and sometimes it may be hard to quickly find the timezone of interest.

Is there any tool which can put a multiple clock instances on the desktop representing each timezone of interest? Similar to the clock in Windows 7.

To be more clear, I am not looking for a weather widget, but a simple clock widget so that I can track time in different timezones.