Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.
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.
Online Alarm Clock - The world's original online alarm clock, established in 2006.
Puzzle Alarm Clock - Puzzle Alarm Clock is an Android-based application which gives a very different sleep monitoring services and an alarm clock module that works according to the user’s requirement.
AlarmDroid - AlarmDroid is an alarm application that is only available on Android devices and possesses many interesting features.