Ruby on Rails

Ruby, not only a female name, but a scripting language.
Rails, an open source framework for Ruby.

Months before I had tried Ruby on Rails, at the same time I was working around with Spring + Hibernate, I was surprised by the RoR, when comparing to the XML hell in Spring and Hibernate (the application context and hbm), you can build a web that provide simple CRUD functions less then an hour. And this video demonstrated how fast it is.

Didn't spend much time on it, the native AJAX support is also amazing, however, it still needs a lot of works on I18N support (when comparing to Java).