The Chrome DevTools are a set of web authoring and debugging tools built into Google Chrome. Use the DevTools to iterate, debug and profile your site.
Lighthouse is an open-source, automated tool for improving the quality of your web apps. Run it as a Chrome Extension or from the command line.
Workbox is a set of tools and libraries to help you simplify your Progressive Web App development and take advantage of the many powerful features of service worker. It helps you free your app from the network, without having to write any boilerplate service worker code!
Material Design Lite
The Polymer Project helps you deliver amazing user experiences by unlocking the full potential of the web platform. Polymer makes the most of Web Components, a powerful new platform feature for extending HTML and componentizing your apps, allowing you to build cutting-edge Progressive Web Apps that load quickly, respond instantly and work from anywhere.
Angular2 is a development platform for building applications across web, mobile, and desktop. With simple, declarative templates, reusable components, and support for all parts of the development experience, Angular2 makes it easy to write, test, and deploy high performing applications at any scale.