sbt

http://www.scala-sbt.org/
http://www.scala-sbt.org/release/docs/Getting-Started/Setup.html
http://www.scala-sbt.org/release/docs/Getting-Started/Hello.html
http://twitter.github.io/scala_school/sbt.html

To have scala REPL :
$ sbt console

[Note] cygpath -w /PATH/TO/YOUR/bin/sbt-launch.jar