Time Buddy - Time Buddy brings a colorful world clock.
Cold Turkey - Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.
Freedom.to - Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
World Clock - World Clock is an app that lets you see the time of any city in the world.
Stay Focused - More suitable with Google Chrome, this service enables you ensure you do not waste precious time on updating Facebook status or chatting with people.