20 Impressive CSS3 Techniques, Libraries and Examples

Libraries

Bootstrap

Bootstrap is a mobile responsive framework. There are lots or similar HTML, CSS, JS Grid frameworks. If you need to start somewhere, why not start with the most popular framework?

Some Alternatives:
Semantic UI

Fancybox

fancyBox is a tool that offers a nice and elegant way to add zooming functionality for images, html content and multi-media on your webpages. It is built on the top of the popular JavaScript framework jQuery and is both easy to implement and a snap to customize.

Waypoints

Waypoints is a library that makes it easy to execute a function whenever you scroll to an element.

Animate.css

CSS animations

Flickity

Useful CSS & JS plugin that makes galleries, sliders, and carrousels that are touch responsive.