Time Buddy - Time Buddy brings a colorful world clock.
TIMEBOX - An advanced timer for professional meeting facilitators
Time Zones Converter - Time Zones Converter is an application which as the name implies, is used for converting time zones.
MetaClock.com - MetaClock is an Online Alarm Clock that can play YouTube videos and uploaded MP3s as an alarm tune. It supports Chromecast which means you can turn your TV or stereo system into an alarm clock. No installation is needed, it can also work offline.
World Clock - World Clock is an app that lets you see the time of any city in the world.
KukuKlok - Kukuklok is a free alarm clock available online and offline.