stealjs - Futuristic JavaScript dependency loader and builder. Speeds up application load times. Works with ES6, CommonJS, AMD, CSS, LESS and more. Simplifies modular workflows.
SystemJS - Configurable module loader enabling dynamic ES module workflows in browsers and NodeJS.
RequireJS - RequireJS is a JavaScript file and module loader.
JSPM - Front End Package Manager, Frontend Development, and Javascript
npm - npm is a package manager for Node.
Webpack - Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.