Play! is meant to be a Rails-like framework for the JVM. I use it at Mapquest (version 1.2), and I like it so far. It contains its own compiler and server, so y

Play! is meant to be a Rails-like framework for the JVM. I use it at Mapquest (version 1.2), and I like it so far. It contains its own compiler and server, so you don't need to rebuild or redeploy when you're developing like you might in other frameworks. I've used Play! 2 for a freelance gig, and didn't like it as much. It tries to compile EVERYTHING (HTML templates, your routes file, etc), and for the simple app I was trying to accomplish, that simply wasn't necessary and led to a lot of unnecessary fighting. I'd recommend giving Play! a try.