Time Buddy - Time Buddy brings a colorful world clock.
Clocks - A minimal world clock app for your Mac's menubar
Time Zone Converter - Time Zone Converter is an online productivity tool to calculate exact time across time zones.
Spacetime - Work hour and time zone management for distributed teams.
World Clock - World Clock is an app that lets you see the time of any city in the world.
Every Time Zone - Online tool for keeping up with times around the world.