CSS only alternative to Javascript !!! These patterns are .

One point is that some examples are using a tons of CSS (i.e. Todo List).
Quite are impressive such as the Twitter like animation.

And other are basic and simple such as the ripple effect: https://github.com/mladenplavsic/css-ripple-effect/blob/master/src/ripple.less
EDIT: this ripple effect is independant of the mouse position on click