Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Alarm Clock Xtreme - Alarm Clock Xtreme: Alarm, Stopwatch, Timer (Free) is the most popular alarm clock app created and published by AVG Labs for both iOS and Android devices.
SleepBot - SleepBot is a sleep tracking app available in Google Play and the Apple App Store.
Awaken - Wake up to Awaken playing your favorite music.
Online Alarm Clock - The world's original online alarm clock, established in 2006.
Song Alarm - song-alarm - Simple alarm clock for Android that plays a selected song at a desired time.