Scalatra

Scalatra is a free and open source web application framework written in Scala. It is a port of the Sinatra framework written in Ruby. Scalatra is an alternative to the Lift, Play!, and Unfiltered frameworks.

Scalatra is an example of a microframework, a web software development framework which attempts to be as minimal as possible.

A full Scalatra application can be written in very few lines of code:

From this tiny domain-specific language, Scalatra can be expanded into a minimal but full-featured model-view-controller web framework. For example, additional libraries can be attached in order to provide templating, object-relational mapping, and unit testing or behaviour driven development support.

Software built with Scalatra

 * LinkedIn used Scalatra to power its now-defunct Signal API.
 * Parts of The Guardian's API services are built in Scalatra.
 * http://gov.uk has built its API systems using Scalatra.