Trying out Vaadin
Spent some time today trying Vaadin
In general it’s a GWT-based solution which makes work with GWT more comfortable. It’s not another GWT component library like ExtGWT or SmartGWT. It dives deeper into the layer up to the JPA layer.
There’s a book available for free which can be used to study Vaadin at http://vaadin.com/download/current/docs/book-of-vaadin.pdf
So the first thing I liked so much – was debug console. You can call it by specifying “?debug” parameter at the end