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
libraryDependencies += "de.b-studios" %% "effekt" % "0.3-SNAPSHOT"
To learn how to use the library, see Your First Effect.