If you're looking for one that's just as feature complete, at the time of writing this reply, the answer is none. At best you can get a form designer that can help in putting controls but that's it. Netbeans, Eclipse, Visual Studio (C# / VB .NET), KDevelop, Anjuta, QtCreator, you name it, all of them will sooner or later hit the wall of true RAD environment, starting from being unable to assign event handlers to design time data show, let alone design time 3D rendering (I love you, GLScene).