Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Song Alarm - song-alarm - Simple alarm clock for Android that plays a selected song at a desired time.
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.
Gentle Alarm - Gentle Alarm can consider your sleepcycles to wake you up when you are in light sleep.
Online Alarm Clock - The world's original online alarm clock, established in 2006.
Insane Alarm - Wakes you up no matter what! Features - obscenely loud blaring emergency alarm sound.