If you're thinking small, something like http://vuejs.org/ http://vuejs.org/ or http://knockoutjs.com/ http://knockoutjs.com/ for views / data binding, and what

If you're thinking small, something like http://vuejs.org/ http://vuejs.org/ or http://knockoutjs.com/ http://knockoutjs.com/ for views / data binding, and whatever else needed to structure the rest of your logic. I'm not mentioning the big popular frameworks because more than enough has already been said about those elsewhere.