You don't have to write any of your backend in Javascript w/ SproutCore or Cappuccino.
My favorite by far is Cappuccino. It designed almost exactly like Cocoa, which is a fantastic framework for writing apps with UIs. It comes with a ton of components that are already designed for you. You can completely skip the cost of a graphic designer (you still have understand interaction design).
My favorite by far is Cappuccino. It designed almost exactly like Cocoa, which is a fantastic framework for writing apps with UIs. It comes with a ton of components that are already designed for you. You can completely skip the cost of a graphic designer (you still have understand interaction design).