Create CSS Transitions When Switching Between Pages – swup
The swup JavaScript library lets you apply custom CSS transitions to pages when switching between them. Supports preload, page cache, and event handlers.
JavaScript & CSS page transition
Smooth Page Transitions With JavaScript And PJAX – barba.js
barba.js is a tiny JavaScript library that uses PJAX (aka push state ajax) to create a smooth transition effect between different webpages.
JavaScript Library For CSS3 Based Page Transitions – Animate Transition
Animate Transition allows you to easily make transition between any two (or more, it all depends on you ) HTML elements.