barba.js ( http://barbajs.org/ ) is a small (4.4kb minified and gzipped), flexible and dependency free library that helps you creating fluid and smooth transitions between your website’s pages, but barba.js is not a ready-to-use library/plugin.
It is necessary to create an additional script for the transition.
Maybe someone wants to create some transitions for barba.js and sell them on codecanyon.net .
Here you can find you some websites with nice page transitions realized with barba.js: http://barbajs.org/examples.html