Bootstrap and web layout UI Kit
Basically, I think it would be great if you had general web buttons/tabs/text/form fields eg. bootstrap themed kit. that gave you elements to drag and drop would help speed up process. Also pre-set layout themes of basic simple web page that has already been laid out and can edit from there. eg.. Simple one page webpage layout with header.. nav.. footer.. and gallery section.. etc. Would really help get someone off to good start with a concept built instead of having to build it all from ground up.