I've written before about Groovy, the scripting language that extends Java into a first-class extensible scripting framework. Given that Ruby on Rails has attracted a lot of attention, it was only natural that somebody build a framework using the ideas from RoR in the context of Java.  Grails …

Check out my O'ReillyNet article on Groovy, the new scripting language for Java. Groovy has the power of Perl, Ruby or Python with most of the syntax and all of the APIs from Java.