sw-toolbox : A collection of service worker tools for offlining runtime requests
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...
Workbox : JavaScript Libraries for adding offline support to web apps.
OWASP : The Open Web Application Security Project (OWASP) is a worldwide not-for-profit charitable organization focused on improving the security of software.