Helloakka is a project mainly written in Scala, it's free.
Simple "Hello World!" template for Akka
Running:
After installing sbt - simple-build-tool use the following commands:
sbt update sbt console
This will download dependencies, build the code and start up a a scala console with akka available.
See blog for further explanation:
http://exploratoryprojects.blogspot.com/2010/12/trying-out-akka.html