MoneyAlarm - u/moneyalarm:
Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.
Insane Alarm - Wakes you up no matter what! Features - obscenely loud blaring emergency alarm sound.
Digital Clock 4 - Beautiful customizable clock with plugins
Fitari Fitness Alarm Clock - The Fitness Alarm Clock will wake you up by making you stand up and do a number of fitness...
AlarmDJ - Online Alarm Clock - Use YouTube videos or MP3 files as alarm sound. Works offline.