Ask HN: Android Material design pattern guide?

Hi, could you tell me some best practices or complete well designed app (example/code) that follow the Material design pattern? Have you other resources to suggest me? I use the official resources provided by google: - development guide : https://developer.android.com/training/material/index.html - design guide : https://www.google.com/design/spec/ -best cases : https://design.google.com/articles/material-design-awards/