The Okio library is a library that helps us with using the java.io and java.nio packages. This course overviews the Okio library and assists every self-learner moving forward independently. 

Koin is a small framework that provides Kotlin developers with a simpler way for implementing dependency injection in their code. Koin is available as an open source project at GitHub. 

Kotlin is a relatively new programming language that was developed by JetBrains. Code written in Kotlin can be easily transpiled both into Java and into JavaScript. Thie course overviews the Kotlin programming language and provides with the fundamental knowledge and understanding required for using Kotlin in applications developed for the Android platform, or for using Kotlin in Java EE server side applications.