Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Y-Alarms - Your Alarms is a free multialarm applications designed for OS 9.1 S60 Symbian smartphones. OS 9.
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.
Song Alarm - song-alarm - Simple alarm clock for Android that plays a selected song at a desired time.
Online Alarm Clock - The world's original online alarm clock, established in 2006.
Sleep as Android - Common alarm clocks ignore your sleep cycles, they wake you on schedule no matter your are currently in your deep sleep. Waking up from deep sleep is unpleasant, it makes you tired and it may negatively affect your productivity during the whole day.