Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
A command line tool and node module that can be used to simplify the process of publishing a module to NPM. This is particularly useful for creating development releases, e.g. nightly or continuous integration releases.