Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
CSS Wand - Easy copy-paste beautiful CSS animations
Animista - Create beautiful CSS animations in your browser
App Animations - Gallery of beautiful iOS animations to inspire your next app
Instagram.css - Complete set of Instagram filters in pure CSS
CSSGradient.io - As a free css gradient generator tool, this website lets you create a colorful gradient background for your website, blog, or social media profile.