Gulp - Task runner https://github.com/gulpjs/gulp/blob/master/docs/getting-started.md
Browserify - Bundle Node CommonJS modules for the client side:
browserify client.js -o public/bundle.js
watchify client.js -o public/bundle.js
Package.json
npm install <pkg> --save or npm install <pkg> --save-dev
CommonJS require paths: http://www.bennadel.com/blog/2169-where-does-node-js-and-require-look-for-modules.htm