Scala Effekt
The Effekt library allows you to structure your effectful programs in a functional way. It thus represents an alternative to traditional monad transformer based program structuring techniques.
To use Effekt (tested with Scala 2.11 and Scala 2.12), include the
following line to your build.sbt file:
libraryDependencies += "de.b-studios" %% "effekt" % "0.1-SNAPSHOT"
To learn how to use the library, see Your First Effect.