Assemble - The static site generator for Node.js, Grunt.js and Yeoman
White Noise - White Noise to help you sleep and games to wake you up.
Metalsmith - An extremely simple, pluggable static site generator.
Wintersmith - Flexible, minimalistic, multi-platform static site generator built on top of node.js
Nanoc - A static-site generator written in Ruby
Harp - The static web server with built-in preprocessing.