https://bit.ly/2nxusfk It includes the SDK that let web designers emulate PWAS on Android devices and Chromebooks (additional plugin required).
https://bit.ly/2wwx34v It helps convert a website into a PWA, and it creates packages for Google Play, App Store and Microsoft Store.
https://webhint.io A tool that will help with PWA’S accessibility, speed and security checking your code for best practices and common errors.
Web App Manifest generator
https://bit.ly/2eyetin It will create the Manifest file and effortlessly take one icon and create all the necessary versions for Android and Windows.