Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Time Zone Converter - Time Zone Converter is an online productivity tool to calculate exact time across time zones.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
World Clock - World Clock is an app that lets you see the time of any city in the world.