I'd say, Scala and Ruby (primarily JRuby, i'd say). Most of time I'm working with Java libraries, and I do enjoy Java a lot, but it's not quite as powerful as S

I'd say, Scala and Ruby (primarily JRuby, i'd say). Most of time I'm working with Java libraries, and I do enjoy Java a lot, but it's not quite as powerful as Scala or Ruby. So, reusing Java libs is awesome, since there's a whole lot of them laying around.