We have just announced a new tool called Blinq which produces a webform from a database schema. This is a really neat product which will make generating database based applications much easier.
Its been suggested that it's a framework like Ruby on Rails. In my opinion this is not correct, it is a scaffold built from the schema like a rails scaffold but does not include the language or framework elements of ROR. Tim has it right in his comparison. Mind you it wouldn’t be difficult to add them..