css-loader is a set of loading indicators / spinners built using single DIV element and pure CSS/CSS3.
SpinThatShit is a set of 12+ pure CSS single element loading spinners which can be used to indicate the content loading status in an elegant way.
lazyembed.js is a lazy loading library for iframe embedded content such as Youtube/Vimeo videos, Google Maps, etc. The library delays the loading of these iframe content until clicked, with custom placeholder support.
mk-spinners is a fresh new collection of cool animated loading indicators/spinners created by pure CSS/SASS.