I quite like Lift which is a Scala framework allowing stupidly fast rapid prototyping (rails is really slow and clunky in comparison) . There are no routes and

I quite like Lift which is a Scala framework allowing stupidly fast rapid prototyping (rails is really slow and clunky in comparison) . There are no routes and all the Javascript stuff is built in (so no annoying manual Ajaxcalls). It is multithreaded via Aktors and has build in comet for async stuff which is almost trivial to use. The example for using the framework a life webchat which is a handful of files with a few lines code each. On top the HTML is, well... proper HTML. No scull operators or such thing. The framework attaches functionality via css selectors in so called snippets which are like small controllers but not for an individual view but more for a specific functionality which helps with reusability. On top you get all the cool thing from scala like option types, static typing with type inference, the speed, multithreading and so on. The biggest downside is the rather awful documentation (often outdated) and the missing migrations. I found it quite a step to lean since it is not an mvc framework and inherently stateful. There are a few free books however.