Barcode Alarm Clock - Alarm clock that won't stop ringing until you scan a barcode
Clocker - Keep track of people in different time zones
Wake N Shake Alarm Clock - Wake up with a jolt of energy ready to get shit done.
World Clock iOS 8 Widget - Check the time, anytime. Just pull down Notification Center.
Alarm Buddy - Alarm Buddy is a fun alarm app that helps you wake up by playing simple, cute and engaging games.
Dato - Better menu bar clock with calendar and time zones