Performance is a project mainly written in Scala, it's free.
Playing around using Spray and Scala. Storing some JMeter output in MongoDB and providing a means to retrieve that data as JSON.
Assuming you have SBT (http://code.google.com/p/simple-build-tool/) installed just clone the repository, go into the directory and use:
sbt update eclipsewhich will create the necessary files to import your project into Eclipse. When you're ready try:
sbt jetty-runto run your creation in Jetty!