Animations
http://animista.net/
https://animate.style/
https://easings.co/
https://cubic-bezier.com/
https://keyframes.app/
Shadows
https://brumm.af/shadows
Borders and clip path
https://bennettfeely.com/clippy/
https://9elements.github.io/fancy-border-radius/
https://wweb.dev/resources/css-separator-generator
Gradient editor
https://shapy.app/
Transform editor
https://css-transform.moro.es/