play-json as it was supposed to be — fully automatic generation of serializers
Spawn and communicate with JavaScript environments on the JVM
Re-type-checking Scala ASTs
UpdateChecker interface for bintray
Automatic derivation of empty instances of types
ScalaCheck Gen for joda-time
Asynchronously writes journal and snapshot entries to configured JDBC databases so that Akka Actors can recover state
Command line interface for the Twirl template compiler
YAML parser interface for Argonaut
Collections and related data structures
A SubScript wrapper for ScalaFX