Alarmy - World's most annoying alarm app

Awake Alarm Clock - Crush oversleeping with Awake – a loud alarm clock for heavy sleepers with wake-up missions and checks. It's a free alarm clock, clock app, alarm app for heavy sleepers.

Alarmate.app - Alarms aren’t just for mornings. Alarmate keeps you on track with unmissable alarms for meetings, deadlines, and routines - ringing until you take action.

SuperAlarm - Start Your Mornings Refreshed with SuperAlarm ??.

Barcode Alarm Clock - Alarm clock that won't stop ringing until you scan a barcode

Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.