Casper Glow - A magical light for better sleep
Sleep Cycle - Bio-alarm clock that wakes you up at optimal times based on your sleep patterns.
Generative.fm - Endlessly unique ambient music
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.