Wintersmith - Flexible, minimalistic, multi-platform static site generator built on top of node.js
Noizio - Feeling that the noise of the big city is too much for you to bear?
Nikola - Nikola is s static site generator tool written in Python.
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.
White Noise - White Noise to help you sleep and games to wake you up.
zenmix.io - Ambient background sound generator