Workbox : JavaScript Libraries for adding offline support to web apps.
sw-precache : Service Worker Precache is a module for generating a service worker that precaches resources. The module can be used in JavaScript-based build scripts...
sw-toolbox : A collection of service worker tools for offlining runtime requests
CSSdoc : This is a draft to bring automatic documentation to CSS files, like its known for JavaScript and PHP files through JavaDoc/DocTags.
Mobile HTML5 compatibility : HTML5 compatibility on mobile and tablet browsers with testing on real devices
The Service Worker Cookbook is a collection of working, practical examples of using service workers in modern web apps.
