npm overview, package.json, npm "scripts" and "bin" settings, publishing to npm, private modules, commonjs and es6
What is a Node Module
How Can You Make a Node Module?
https://www.npmjs.org/doc/files/package.json.html#bin
http://nodejs.org/api/modules.html#modules_core_modules
http://substack.net/how_I_write_modules
https://github.com/substack/browserify-handbook#node-packaged-modules