From Java To Kotlin - Your Cheat Sheet For Java To Kotlin
An HTTP client for Android, Kotlin, and Java.
Android Developer Roadmap - A complete roadmap to learn Android App Development
LiquiCouch is a data migration tool for Java, Scala, Kotlin (or any other JVM lang) inspired by Liquibase
Stream Chat official Android SDK. The tutorial covers how to build your own chat experience using either Java or Kotlin.