tapable(latest: 2.2.0) Just a little module for plugins.
source-map-loader(latest: 1.1.3) extracts inlined source map and offers it to webpack
webpack(latest: 5.10.0) Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.