I like SpecFlow (http://specflow.org/ http://specflow.org/), a .net flavor of cucumber. It's not quite rapid development, but as with others here I've found the

I like SpecFlow (http://specflow.org/ http://specflow.org/), a .net flavor of cucumber. It's not quite rapid development, but as with others here I've found the test recorders to be too brittle to justify the upfront time savings anyway. I've used it for front end testing and database/view testing.