Assemble - The static site generator for Node.js, Grunt.js and Yeoman
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.
Metalsmith - An extremely simple, pluggable static site generator.
Noizio - Feeling that the noise of the big city is too much for you to bear?
Wintersmith - Flexible, minimalistic, multi-platform static site generator built on top of node.js
MyNoise - Custom shaped online noise machines. Many Many generic sounds