From TIME magazine comes insight into what Ruby on Rails does:
To help build Basecamp, Campfire and the company’s other core applications, [David] Hansson developed Ruby on Rails. It gives 37signals’ software a consistent look: sleek, friendly and without the extraneous bells and whistles that plague much of the bloated software sold by larger companies.
True, I’m not a programmer but lets makes this clear, Ruby on Rails has absolutely nothing—zero, zip, zilch—to do with the look of applications and websites. Sorry TIME, you still need to hire designers to do that kind of work.