Microsoft Time Zone is described as 'Do you have relatives that live far away? Do you work with people from other countries? Use this simple utility to keep track of the time in other part of the world. Share your ideas without waking up your buddies'. There are more than 10 alternatives to Microsoft Time Zone for a variety of platforms, including Windows, iPhone, iPad, Online / Web-based and Android. The best alternative is World Time Buddy, which is free. Other great apps like Microsoft Time Zone are FoxClocks (Free, Open Source), Every Time Zone (Free), Sharp World Clock (Paid) and Sun Clock (Free Personal).
FoxClocks is a Firefox/Thunderbird extension to display local times around the world in your status bar or any toolbar. Virtually all the worlds time zones are supported. FoxClocks also allows you to explore each time zone in Google Earth.
WorldClock shows you the time in different places over the world. Also included are the Swatch Internet Time, Julian Date and StarDate. You can also use it to synchronize the time with an atomic clock.