Typesafe Stack is a distribution of Scala (2.9.0) and Akka (1.1, an actor framework for Scala with various tools for programming distributed solutions in Scala) for easy installation. Additionally, it points to sbt and Scala IDE for Eclipse (use the beta version 2, as this is completely new and the 1.x versions do not work with Scala 2.9.0 and are not particularly good) as supplements. Installers are available for Windows, OSX, and Linux (you can of course install them yourself on all platforms, but some people prefer normal installation paths). And if you want, you can buy support there - and the company belongs to Odersky, the Scala inventor and JVM languages guru. Actually, Odersky could also include his book on Scala programming as PDF (in the first edition, this is also free).