Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
Galarm - Social alarm clock and reminders
Noizio - Feeling that the noise of the big city is too much for you to bear?
Alarmy - World's most annoying alarm app
MyNoise - Custom shaped online noise machines. Many Many generic sounds
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.