Woah.css : CSS Animation Library for eccentric web developers.
AOS : Animate On Scroll Library.
Small library to animate elements on your page as you scroll.
Anime.js : Anime.js is a fast, multipurpose and lightweight JavaScript animation library with a simple, yet powerful API.
It works with CSS properties, SVG, DOM ...
Diagnostic.css : Diagnostic.css is a stylesheet which allows the user to test for common errors in a page's markup.
Also : https://github.com/karlgroves/diagnostic.css
HTML5 Boilerplate : HTML5 Boilerplate helps you build fast, robust, and adaptable web apps or sites. Kick-start your project with the combined knowledge and effort of 100...
Animate.css is a bunch of cool, fun, and cross-browser animations for you to use in your projects.