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.
Gulp plugin that tracks dependencies between files and adds any files that depend on the files currently in the stream, thus enabling incremental build of pcss, less, scss, sass, with extensibility points to support other file types.