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.
markdown-it plugin for modifying tokens in a markdown document. It can for example modify content or attributes for certain type of elements like links or images.