Helpful sites while publishing android apps

Here are the list of sites I usually refer while publishing apps on play store :

1) Design your app icon : https://romannurik.github.io/AndroidAssetStudio/

2) Design your app feature graphic : https://www.norio.be/android-feature-graphic-generator/

3) Step by step guide to publish application :
                                                    https://developer.android.com/studio/publish/preparing.html