Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Clocker - Keep track of people in different time zones
The Rock Clock - A motivational alarm clock from Dwane 'The Rock' Johnson
World Clock iOS 8 Widget - Check the time, anytime. Just pull down Notification Center.
Integrator.io iPaaS by Celigo - Next-Generation iPaaS integration platform
Dato - Better menu bar clock with calendar and time zones