2. Customtabs KotlinHelpers of the Chrome Custom tabs re-written in Kotlin and with Architecture Components to offer a simpler API
3. MaterialarcmenuAn android custom view which allows you to have a arc style-menu on your pages
4. OnePreferenceA library which presents all your preference in a single list on the phone, without the two-step header and detail approach followed by the Android SDK. For tablets, it uses the two pane layout.
5. Lint-ChecksA collection of helpful lint checks not available out of the box in Android Lint